JP6900966B2 - Electronics and programs - Google Patents

Description

The present invention relates to electronic devices and programs.

There are known cameras that have a connector that can handle multiple types of external devices with different interfaces, recognize the interface that should be applied to the external device connected to the connector, and make the recognized interface work ( For example, see Patent Document 1).
[Prior art literature]
[Patent Document]
[Patent Document 1] Japanese Unexamined Patent Publication No. 6-217175

There is a problem that the external device mounted on the electronic device cannot be easily accessed from another external device.

In the first aspect, the electronic device is the first protocol and the first protocol and the first between the first connection part, the second connection part, and the first external device connected to the first connection part through the first connection part. A transmission unit that transmits data using the protocol selected from the two protocols and transmits data with the second external device connected to the second connection unit using the second protocol through the second connection unit, and a second transmission unit. Between the first state in which the data transmission line connected to the connection unit is connected to the transmission unit and the second state in which the data transmission line connected to the second connection unit is connected to the data transmission line in the first connection unit. It is equipped with a control unit for switching.

In the second aspect, the program is connected to the first external device connected to the first connection unit, and the transmission unit data data in the selected protocol of the first protocol and the second protocol through the first connection unit. The step of transmitting data with the second external device connected to the second connection unit by the transmission unit using the second protocol through the second connection unit, and the data connected to the second connection unit. The computer executes a step of switching between the first state in which the transmission line is connected to the transmission unit and the second state in which the data transmission line connected to the second connection unit is connected to the data transmission line of the first connection unit. Let me.

The outline of the above invention does not list all the necessary features of the present invention. Sub-combinations of these feature groups can also be inventions.

An example of the camera system 5 is schematically shown. An example of the system configuration of the camera 10 is shown together with the external memory 180. The block configuration of the SoC200, the switching control unit 230, and the external memory 180 is shown together with the wiring. The correspondence between the state of the camera 10 and the user setting state and the connection state of the transmission line is shown. The state transition of the camera 10 is shown. An example of the operation from the start to the end of the camera 10 is shown. The control flow when controlling the connection state of the transmission line when the camera 10 starts operation is shown. The control flow when the external device 110 is connected to the USB connector 152 when the camera 10 is operating is shown. The control flow when the external device 110 is removed from the USB connector 152 when the camera 10 is operating is shown. The processing flow when controlling the connection state of the transmission line when the camera 10 ends the operation is shown. The processing of the camera 10 when the PC 21 is connected to the USB connector 152 when the camera 10 is not operating is shown.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the inventions that fall within the scope of the claims. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention.

FIG. 1 schematically shows an example of the camera system 5. The camera system 5 includes a camera 10, an external memory 180, a USB (Universal Bus) cable 105, and an external device 110. The external device 110 includes a PC 21 and a communication accessory 22. The PC 21 is a personal computer.

The camera 10 is a single-lens reflex camera as an example of an imaging device. The camera 10 includes a camera body 130 and a lens unit 120. The lens unit 120 is attached to the camera body 130. The lens unit 120 is an interchangeable lens and is removable from the camera body 130.

An external memory 180 is attached to the memory card connector 151 of the camera body 130. The external memory 180 is an example of an external device. The external memory 180 can communicate with the camera 10 in accordance with the PCI Express® standard. The external memory 180 can also communicate with the camera 10 according to the USB standard. The external memory 180 communicates with the SoC 200 included in the camera body 130 to transmit data according to a standard selected from the PCI Express standard and the USB standard. For example, the SoC 200 records the image data obtained by taking a picture in the external memory 180 attached to the memory card connector 151.

A USB cable 105 and a communication accessory 22 can be attached to the USB connector 152 included in the camera body 130. The PC 21 is connected to the camera 10 via the USB cable 105. The PC 21 and the communication accessory 22 are examples of external devices. The PC 21 and the communication accessory 22 communicate with the camera 10 according to the USB standard, and transmit data with and from the camera 10. Specifically, the PC 21 and the communication accessory 22 communicate with the SoC200 in accordance with the USB standard to transmit data.

The PC 21 acquires the image data recorded in the external memory 180 via the USB cable 105. The PC 21 can acquire the image data recorded in the external memory 180 via the SoC200. Further, as will be described later, the PC 21 can directly acquire the image data recorded in the external memory 180 from the external memory 180 without going through the SoC 200. The PC 21 has a self-power supply, and can supply power to the camera 10 via the USB connector 152.

The communication accessory 22 performs wireless communication with an external wireless device while being attached to the camera body 130. The communication accessory 22 controls the camera 10 by receiving, for example, a wireless signal from a wireless remote controller. When the communication accessory 22 receives a wireless signal instructing shooting from the wireless remote controller, the communication accessory 22 instructs the camera 10 to shoot. Further, the communication accessory 22 transmits the image data generated by the camera 10 to an external wireless device. The communication accessory 22 does not have a self-power supply and operates with the power supplied from the camera 10 via the USB connector 152.

In the camera body 130, the transmission line 181 connected to the memory card connector 151 can be directly connected to the transmission line 111 connected to the memory card connector 151 under the control of the switching control unit 230. The switching control unit 230 switches between a state in which the transmission line 181 is connected to the transmission line 111 and a state in which the transmission line 111 is connected to the transmission line 116 connected to the SoC200. In the state where the transmission line 111 is connected to the transmission line 116, the SoC 200 can transmit data by USB connection with the PC 21 and the communication accessory 22 connected to the USB connector 152.

On the other hand, in the state where the transmission line 181 is connected to the transmission line 111, the PC 21 can directly transmit data to and from the external memory 180 by the USB connection. In the description of the camera system 5, the state in which the transmission line 181 is connected to the transmission line 111 may be referred to as a direct connection state. On the other hand, the state in which the transmission line 181 is connected to the transmission line 111 may be referred to as a non-direct connection state.

The external memory 180 can also operate as a mass storage class device in the USB standard. When the connection state of the transmission line is the direct connection state, the PC 21 accesses the external memory 180 according to the specifications of the mass storage class. Therefore, the PC 21 can directly access the external memory 180 without the need for control by the camera 10. For example, even when the power switch 14 of the camera 10 is in the OFF state, the PC 21 can directly access the external memory 180 without requiring control by the SoC200.

On the other hand, when the communication accessory 22 is connected to the camera 10, the connection state of the transmission line is changed to the non-direct connection state. When the power switch 14 is in the ON position, the camera 10 supplies power to the communication accessory 22 to operate the communication accessory 22.

As described above, according to the camera 10, when the connection state of the transmission line is the direct connection state, the PC 21 can directly access the external memory 180 without operating the SoC200. Therefore, the PC 21 can easily access the external memory 180. Further, since the SoC 200 does not have to be operated when the PC 21 accesses the external memory 180, the power consumption of the camera 10 can be reduced. Further, even when the power switch 14 is in the OFF position and power is not supplied to the SoC 200 or the like, or when there is no remaining capacity of the battery that becomes the power source of the camera body 130, the PC 21 is an external memory attached to the memory card connector 151. You can access 180.

FIG. 2 shows an example of the system configuration of the camera 10 together with the external memory 180. FIG. 2 shows a block configuration of the entire camera 10 in which the lens unit 120, which is an interchangeable lens, is mounted on the camera body 130.

The lens unit 120 includes a lens mount having a lens mount contact 121. The camera body 130 includes a camera mount having a camera mount contact 131. When the lens mount and the camera mount are engaged and the lens unit 120 and the camera body 130 are integrated, the lens mount contact 121 and the camera mount contact 131 are connected. The lens MPU 123 is connected to the camera MPU 140 via the lens mount contact 121 and the camera mount contact 131, and controls the lens unit 120 in cooperation with each other while communicating with each other.

The lens unit 120 includes a lens group 122, a lens driving unit 124, and a lens MPU 123. The subject light passes through the lens group 122 as an optical system of the lens unit 120 and is incident on the camera body 130. The mirror unit including the main mirror 145 and the sub mirror 146 can take an advance position in the subject luminous flux centered on the optical axis of the lens group 122 and a retracted position retracted from the subject luminous flux. The sub mirror 146 is displaced in conjunction with the displacement of the main mirror 145. When the main mirror 145 is in a position retracted from the subject luminous flux, the sub mirror 146 is also in a position retracted from the subject luminous flux. When the main mirror 145 is in a position advanced into the subject luminous flux, the sub mirror 146 is also in a position advanced in the subject luminous flux. When the release button is pushed, the mirror unit moves up from the retracted position and is displaced to the retracted position, and when the image pickup operation by the image sensor 132 is completed, the mirror unit descends from the retracted position and returns to the retracted position.

When the mirror unit is in the advanced position, the main mirror 145 reflects a part of the subject luminous flux that has passed through the lens group 122. Specifically, a half mirror is formed in a part of the main mirror 145. A part of the subject luminous flux incident on the half mirror region of the main mirror 145 is transmitted, and the other part is reflected. The subject luminous flux reflected by the main mirror 145 is presented to the user as a subject image through the focus plate 161, the transmissive display panel 160, the pentaprism 147, the eyepiece optical system 162, and the finder window 163. The user can confirm the composition or the like based on the presented subject image. The transmissive display panel 160 presents to the user various information including information indicating the setting state of the imaging operation as well as the subject image based on the subject luminous flux. The transmissive display panel 160 superimposes the subject image based on the subject luminous flux and presents various information to the user under the control of the camera MPU 140.

A part of the subject luminous flux transmitted through the half mirror region of the main mirror 145 is reflected by the sub mirror 146 and guided to the AF unit 142. The AF unit 142 has a plurality of photoelectric conversion element sequences that receive the subject luminous flux. The photoelectric conversion element train outputs a signal having the same phase when it is in the in-focus state, and outputs a signal out of phase when it is in the front pin state or the rear pin state. The amount of phase shift corresponds to the amount of shift from the focal state. The AF unit 142 detects the phase difference by performing a correlation calculation on the output of the photoelectric conversion element train, and outputs a phase difference signal indicating the phase difference to the camera MPU 140.

The focal state of the lens group 122 is adjusted by using the phase difference signal from the AF unit 142 under the control of the camera MPU 140 or the like. For example, the target position of the focus lens included in the lens group 122 is determined by the camera MPU 140 based on the focal state detected from the phase difference signal, and the position of the focus lens is controlled by the control of the lens MPU 123 toward the determined target position. Will be done. Specifically, the lens MPU 123 controls the lens driving unit 124 including the focus lens motor as an example to move the focus lens constituting the lens group 122. In this way, when the main mirror 145 is down to the advanced position and the mirror unit is in the advanced position, the focal state of the lens group 122 is detected by the phase difference detection method and the focus is adjusted. The AF unit 142 is provided with photoelectric conversion elements at a plurality of positions corresponding to the plurality of focus adjustment positions in order to adjust the focus state at each of the plurality of focus adjustment positions within the imaging range of the image pickup element 132.

The photometric element 144 is an example of a photometric unit that measures the subject light. The photometric element 144 has a photoelectric conversion element that receives a part of the luminous flux guided by the pentaprism 147. The luminance information of the subject detected by the photoelectric conversion element included in the photometric element 144 is output to the camera MPU 140 as a photometric value. The camera MPU 140 controls each unit based on the luminance information acquired from the photometric element 144. For example, the camera MPU 140 calculates an AE evaluation value based on the brightness information and performs exposure control based on the AE evaluation value. When the recording range is set, the camera MPU 140 is based on the luminance information detected by the photoelectric conversion element located in the range corresponding to the recording range among the plurality of photoelectric conversion elements included in the photometric element 144. The AE evaluation value may be calculated.

When the main mirror 145 retracts from the subject luminous flux, the sub mirror 146 retracts from the subject luminous flux in conjunction with the main mirror 145. A focal plane shutter 143 is provided on the lens group 122 side of the image sensor 132. The focal plane shutter 143 is a mechanical shutter as an example. When the mirror unit is in the retracted position and the focal plane shutter 143 is in the open state, the subject luminous flux transmitted through the lens group 122 is incident on the light receiving surface of the image sensor 132. The focal plane shutter 143 controls the exposure by opening and closing the optical path of the subject light incident on the image sensor 132.

The image sensor 132 functions as an image pickup unit. The image sensor 132 images a subject with a subject light flux that has passed through the lens group 122. As the image sensor 132, for example, a solid-state image sensor such as a CMOS sensor or a CCD sensor can be exemplified. The image pickup element 132 has a plurality of photoelectric conversion elements that receive the subject luminous flux, and outputs an analog signal corresponding to the amount of accumulated charge generated by each of the plurality of photoelectric conversion elements to the analog processing unit 133. The analog processing unit 133 performs analog processing such as amplification processing and OB clamping processing on the analog signal output from the image sensor 132, and outputs the analog signal to the A / D converter 134. The A / D converter 134 converts the analog signal output from the analog processing unit 133 into a digital signal representing image data and outputs the signal. The image sensor 132, the analog processing unit 133, and the A / D converter 134 are driven by the drive unit 148 that receives an instruction from the camera MPU 140.

The digital signal output from the A / D converter 134 as a digital signal is input to the ASIC 135 as image data. The ASIC 135 is an integrated circuit that integrates circuits and the like related to the image processing function into one. The ASIC 135 uses at least a part of the memory area of the RAM 136 as an example of the volatile memory as a buffer area for temporarily storing the image data, and performs various image processing on the image data stored in the RAM 136. Give. Examples of the image processing by the ASIC 135 include noise reduction processing, defect pixel correction, white balance adjustment, color interpolation processing, color correction, gamma correction, contour enhancement processing, and image data compression processing.

When the image sensor 132 continuously captures images, the image data that are sequentially output are sequentially stored in the buffer area. The plurality of image data obtained by the continuous imaging by the image pickup device 132 are sequentially stored in the buffer area as image data of continuous still images or image data of each image constituting a moving image. The RAM 136 also functions as a frame memory for temporarily storing frames when processing moving image data in the ASIC 135.

Examples of the image processing in the ASIC 135 include a process of generating image data for recording, a process of generating image data for display, and an image data process for automatic focus adjustment (AF). Further, the image processing in the ASIC 135 includes a process of detecting the amount of contrast for the AF process and the like. Specifically, the ASIC 135 detects the amount of contrast from the image data and supplies it to the camera MPU 140. For example, the ASIC 135 detects the amount of contrast from each of a plurality of image data obtained by positioning a focus lens at different positions in the optical axis direction and taking an image. The camera MPU 140 adjusts the focal state of the lens group 122 based on the detected contrast amount and the position of the focus lens. For example, the camera MPU 140 determines the target position of the focus lens so as to increase the amount of contrast, and causes the lens MPU 123 to control the position of the focus lens toward the determined target position. In this way, when the main mirror 145 is up and in the retracted position, the focal state of the lens group 122 is detected by the contrast detection method and the focus is adjusted. In this way, the camera MPU 140 cooperates with the ASIC 135 and the lens MPU 123 to adjust the focus of the lens group 122.

When recording the image data output from the A / D converter 134, the ASIC 135 converts the image data into image data in a standardized image format. For example, the ASIC 135 performs a compression process for generating still image data encoded in a coding format conforming to a standard such as JPEG from the image data of a still image. In addition, the ASIC135 has a plurality of frames in QuickTime, H.A. A compression process is performed to generate moving image data encoded by a coding method conforming to standards such as 264, MPEG2, and Motion JPEG. Image data such as still image data and moving image data for recording generated by the ASIC 135 is transferred from the RAM 136 to the external memory 180 under the control of the SoC 200.

The external memory 180 is attached to the memory card connector 151. The external memory 180 is removable from the camera body 130. The external memory 180 is an example of a non-volatile recording medium. The external memory 180 may be a semiconductor memory such as a flash memory. The external memory 180 is, for example, an XQD® memory card. The image data for recording stored in the RAM 136 is recorded in the external memory 180 under the control of the SoC200. Further, the image data recorded in the external memory 180 is transferred to the RAM 136 under the control of the SoC 200 and stored in the RAM 136.

The ASIC 135 generates image data for display in parallel with the generation of image data for recording. For example, the ASIC 135 generates display image data to be displayed on the display unit 138 during a so-called live view operation. Further, when reproducing an image, the ASIC 135 generates image data for display from the image data read from the external memory 180. The generated image data for display is converted into an analog signal according to the control of the display control unit 137 and displayed on the display unit 138 of a liquid crystal display or the like. Further, along with the image display based on the image data obtained by imaging, various menu items related to various settings of the camera 10 can be displayed by the control of the ASIC 135 and the display control unit 137 without displaying the image based on the image data. It is displayed at 138.

The SoC200 performs USB communication with the external device 110 attached to the USB connector 152 to transmit data. The SoC 200 transmits data to and from the external device 110 via the switching control unit 230 and the transmission line 111. The SoC 200 communicates with the external memory 180 mounted on the memory card connector 151 by PCI Express or USB to transmit data. The SoC200 transmits data to and from the external memory 180 via the switching control unit 230 and the transmission line 181. In this way, the SoC 200 is responsible for data transmission with the external device 110 and data transmission with the external memory 180. The image data recorded in the external memory 180 can be transferred to the external device 110 through the SoC 200. Further, the image data acquired by communication from the external device 110 through the SoC 200 can be recorded in the external memory 180. The specific configuration of the SoC 200 and the switching control unit 230 will be described later.

The operation input unit 141 accepts a user operation. In addition to the power switch 14, the operation input unit 141 includes various operation members such as a release button, a command dial, a multi selector, a shooting mode dial, and a live view switch. Further, the operation input unit 141 may include an input member integrally mounted with the display unit 138 as a touch panel or the like.

The camera MPU 140 detects that the operation input unit 141 has been operated, and executes an operation according to the operation. For example, the camera MPU 140 controls each part of the camera 10 to execute an imaging operation when the release button is pressed. Further, the camera MPU 140 controls each part of the camera 10 so as to operate according to the menu items and the operation contents displayed on the display unit 138 when the input member mounted as the touch panel is operated. In this way, the camera MPU 140 specifies the user instruction based on the operation for the operation input unit 141, and executes the operation based on the specified user instruction.

The camera 10 is directly or indirectly controlled by the cameras MPU140, ASIC135 and SoC200, including the controls described above. Constants, variables and other parameters, programs and the like necessary for the operation of the camera 10 are stored in the system memory 139. The system memory 139 is a non-volatile memory that can be electrically erased and stored, and is composed of, for example, a flash ROM, an EEPROM, or the like. The system memory 139 stores parameters, programs, and the like so as not to be lost even when the camera 10 is not operating. The parameters, programs, etc. stored in the system memory 139 are expanded in the RAM 136 and used for controlling the camera 10. The ASIC 135, RAM 136, system memory 139, display control unit 137, camera MPU 140 and SoC 200 in the camera body 130 are connected to each other by a connection interface 149 such as a bus to exchange various data.

Each part of the camera body 130, each part of the lens unit 120, and the external memory 180 receive power from the power supply 190 via the power supply circuit 192. Examples of the power supply 190 include a secondary battery such as a lithium ion battery that can be attached to and detached from the camera body 130, a system power supply, and the like. A secondary battery is an example of a battery, and the battery includes a primary battery that cannot be substantially charged. The camera MPU 140 controls the power supply from the power supply 190 to each part of the camera 10 by controlling the power supply circuit 192.

FIG. 3 shows the block configuration of the SoC200, the switching control unit 230, and the external memory 180 together with the wiring for connecting each unit. The SoC200 has a recording medium IF unit 201, an external device IF unit 202, and a switching signal output unit 208.

When transmitting data according to the PCI Express standard, the recording medium IF unit 201 transmits the data via the transmission line 186, the transmission line 181 and the transmission line 183. When transmitting data according to the USB standard, the recording medium IF unit 201 transmits the data via the transmission line 186. The transmission line 186 and the transmission line 181 are shared transmission lines used for both the case of transmitting data according to the PCI Express standard and the case of transmitting data according to the USB standard. For example, transmission line 186 and transmission line 181 are two data transmission lines that transmit differential signals. The transmission line 186 includes a transmission line that transmits a control signal such as an address signal. The transmission line 181 is connected to the data terminal of the memory card connector 151. The power supply line 188 is connected to the power supply terminal of the memory card connector 151, and supplies power from the power supply 190 to the external memory 180.

When transmitting data to the external device 110 in accordance with the USB standard, the external device IF unit 202 transmits the data via the transmission line 116 and the transmission line 111. The transmission line 116 and the transmission line 111 are two data transmission lines that transmit a differential signal. The transmission line 111 is connected to the data terminal of the USB connector 152. The power supply line 118 is connected to the power supply terminal of the USB connector 152. The power supply line 118 is a VBUS line.

When the external device 110 attached to the USB connector 152 is a device having a self-power supply such as a PC 21, the power supplied from the PC 21 is supplied to the camera 10 via the power supply line 118. When the external device 110 attached to the USB connector 152 is a device such as the communication accessory 22 that does not have its own power supply, the power supplied from the power supply 190 is supplied to the external device 110 via the power supply line 118.

The external memory 180 includes a PCIeIF unit 310, a USBIF unit 320, a controller unit 340, a memory unit 330, and a connector 350. The connector 350 is attached to the memory card connector 151.

The PCIe IF unit 310 receives the signal transmitted via the transmission line 181 according to the PCI Express standard and supplies the signal to the controller unit 340 as data. The controller unit 340 records the data supplied from the PCIeIF unit 310 in the memory unit 330.

The memory unit 330 includes a plurality of recording elements. The controller unit 340 causes the recording element included in the memory unit 330 to record the data supplied from the PCIeIF unit 310. Further, the controller unit 340 reads data from the recording element included in the memory unit 330 and supplies the data to the PCIeIF unit 310. The PCIeIF unit 310 converts information such as data supplied from the controller unit 340 into a signal according to the PCI Express standard and outputs the information to the transmission line 181 or the transmission line 183.

Similarly, the USB IF unit 320 receives the signal transmitted via the transmission line 181 according to the USB standard and supplies the signal to the controller unit 340 as data. The controller unit 340 records the data supplied from the USB IF unit 320 in the memory unit 330. The controller unit 340 causes the recording element included in the memory unit 330 to record the data supplied from the USB IF unit 320. Further, the controller unit 340 reads data from the recording element included in the memory unit 330 and supplies the data to the USB IF unit 320. The USB IF unit 320 converts information such as data supplied from the controller unit 340 into a signal according to the USB standard and outputs it to the transmission line 181.

The switching control unit 230 includes a switching controller 240, a first switch 210, a second switch 220, and an internal connection line 250. The first switch 210 has a contact 211 connected to the transmission line 186 and a contact 212 connected to the internal connection line 250. The first switch 210 operates according to the signal supplied from the switching controller 240. For example, when the signal level of the signal supplied from the switching controller 240 is H level, the first switch 210 connects the transmission line 181 to the contact 212. When the signal level of the signal supplied from the switching controller 240 is L level, the transmission line 181 is connected to the contact 211.

The second switch 220 has a contact 221 connected to the transmission line 116 and a contact 222 connected to the internal connection line 250. The second switch 220 operates according to the signal supplied from the switching controller 240. For example, when the signal level of the signal supplied from the switching controller 240 is H level, the second switch 220 connects the transmission line 111 to the contact 222. When the signal level of the signal supplied from the switching controller 240 is L level, the second switch 220 connects the transmission line 111 to the contact 221.

The changeover controller 240 outputs a signal for controlling the first switch 210 and the second switch 220 according to the signal supplied from the control signal line 288. For example, when the signal level of the signal supplied from the control signal line 288 is H level, the switching controller 240 outputs the H level signal (H signal) to the first switch 210 and the second switch 220. When the signal level of the signal supplied from the control signal line 288 is L level, the switching controller 240 outputs the L level signal (L signal) to the first switch 210 and the second switch 220.

Therefore, when the signal level of the signal supplied from the control signal line 288 is H level, the transmission line 181 is electrically directly connected to the transmission line 111. That is, when the signal level of the signal supplied from the control signal line 288 is H level, the connection state of the transmission line is the direct connection state. When the signal level of the signal supplied from the control signal line 288 is L level, the transmission line 111 is electrically directly connected to the transmission line 116, and the transmission line 181 is electrically directly connected to the transmission line 186. .. That is, when the signal level of the signal supplied from the control signal line 288 is L level, the connection state of the transmission line is a non-direct connection state.

The power supply line 188 and the power supply line 118 are connected to the switching control power supply line 194. A + 5V power supply voltage is supplied to the switching control power supply line 194 using the power supply 190 as a power supply. The switching control power supply line 194 is connected to the control signal line 288 via the resistor 196. The control signal line 288 is pulled up when the power switch 14 is turned on and power is supplied from the power supply 190, or when power is supplied from the PC 21 via the USB connector 152.

The switching signal output unit 208 controls the signal level of the control signal line 288. The switching signal output unit 208 maintains the signal level of the control signal line 288 at the L level when the connection state of the transmission line is changed to the non-direct connection. The switching signal output unit 208 switches the signal level of the control signal line 288 from the H level to the L level when the connection state of the transmission line is switched from the direct connection to the non-direct connection. The switching signal output unit 208 maintains the signal level of the control signal line 288 at the H level when the connection state of the transmission line is changed to the direct connection. The switching signal output unit 208 switches the signal level of the control signal line 288 from the L level to the H level when the connection state of the transmission line is switched from the non-direct connection to the direct connection.

Here, the operation of the camera 10 will be described by taking up the case where the PC 21 is connected to the USB connector 152. It is assumed that the power supply 190 has a remaining capacity exceeding a predetermined value, and the memory card connector 151 is equipped with an external memory 180. In the following description, unless otherwise specified, the power supply 190 is attached to the camera 10, the power supply 190 has a remaining capacity exceeding a predetermined value, and the memory card connector 151 is equipped with an external memory 180. It is assumed that it has been done.

When the USB connector 152 is not equipped with any external device 110 and the power switch 14 is in the OFF position and the PC 21 is connected to the USB connector 152 via the USB cable 105, the power from the PC 21 is reduced. It is supplied to the switching control power supply line 194 via the power supply line 118. As a result, the signal level of the control signal line 288 becomes the H level. The switching controller 240 operates by the electric power supplied from the power supply line 118, and outputs an H level signal (H signal) to the first switch 210 and the second switch 220 according to the signal level of the control signal line 288. As a result, the state of the transmission line becomes the state of direct connection.

Further, the electric power supplied from the PC 21 through the power supply line 118 is supplied to the external memory 180 through the power supply line 188. As a result, each part of the external memory 180 operates by the electric power supplied from the PC 21. When power is supplied to the external memory 180 and the operation of the external memory 180 starts, the PC 21 negotiates with the controller unit 340 via the USB IF unit 320 to establish a USB connection. In this way, when the PC 21 is connected to the USB connector 152 while the power switch 14 is in the OFF position, the connection state of the transmission line becomes the direct connection state. As a result, even when the power of the camera 10 is turned off, the PC 21 can transmit data to and from the external memory 180 by USB communication.

FIG. 4 shows the correspondence between the state of the camera 10 and the user setting state and the connection state of the transmission line. The state of the camera 10 includes the state of being attached to the USB connector 152, the remaining capacity of the battery, and the state of the power switch 14.

The user setting state is a memory access mode setting state set by the user. The memory access mode includes an external access mode in which the PC 21 directly accesses the external memory 180 without going through the SoC 200, and a camera access mode in which the SoC 200 accesses the external memory 180. The user can set the camera access mode in advance through the user setting menu or the like.

Generally, the connection state of the transmission line is that when the external device 110 connected to the USB connector 152 cannot supply power through the power supply line 118, the connection state of the transmission line is a non-direct connection state. For example, when the communication accessory 22 is attached to the USB connector 152, the connection state of the transmission line is a non-direct connection state. When the external device 110 is not connected to the USB connector 152, the connection state of the transmission line is a non-direct connection state. If the external device 110 connected to the USB connector 152 cannot supply power through the power supply line 118, or if the external device 110 is not connected to the USB connector 152, the remaining battery capacity, the state of the power switch 14, and the user settings Regardless of, the connection state of the transmission line is the non-direct connection state. As described above, when the power cannot be supplied to the external memory 180, the connection state of the transmission line is not the direct connection state but the non-direct connection state.

When the external device 110 is connected to the USB connector 152 and the external device 110 can supply power through the power supply line 118 and the camera 10 cannot supply power to the external memory 180, the connection state of the transmission line is directly connected. It becomes the state of. For example, when the PC 21 is connected to the USB connector 152 and the power cannot be supplied from the camera 10 to the external memory 180, the connection state of the transmission line becomes the direct connection state. On the other hand, when the external device 110 connected to the USB connector 152 can supply power through the power supply line 118 and the camera 10 can supply power to the external memory 180, the connection state of the transmission line is determined based on the user setting. Will be done. For example, when the PC 21 is connected to the USB connector 152 and the camera 10 has a remaining capacity and the power switch 14 is in the ON position, the connection state of the transmission line is set to the direct connection state or not. Whether to make a direct connection is determined based on the memory access mode. For example, when the external access mode is selected as the memory access mode, the connection state of the transmission line is the direct connection state, and when the camera access mode is selected as the memory access mode, the connection state of the transmission line is set. Is in a non-direct connection state.

FIG. 5 shows the state transition of the camera 10. FIG. 5 shows a state transition, especially when there is a remaining capacity of the power supply 190.

The state 510 is a state in which the external device 110 is not connected to the USB connector 152 and the power switch 14 is in the OFF state. The state 510 is a state in which power is not supplied to the camera 10. In this case, the connection state of the data transmission line is a non-direct connection state.

In the state 510, when the communication accessory 22 is connected to the USB connector 152, the connection state of the transmission line does not change. When the communication accessory 22 is connected to the USB connector 152, the power supply line 118 does not change to the H level. Therefore, the fact that the communication accessory 22 is connected to the USB connector 152 is not detected by the switching control unit 230.

In the state 510, when the USB cable 105 connected to the PC 21 is inserted into the USB connector 152, the state transitions to the state 520. In the state 520, the transmission line is in the direct connection state, and at least the main parts of the camera 10 such as the SoC200, the ASIC135, and the camera MPU140 are in the non-operating state. As described above, when the PC 21 is connected to the USB connector 152 in the state 510, the power supply line 188 becomes the H level and the control signal line 288 becomes the H level. The switching control unit 230 outputs an H signal to the first switch 210 and the second switch 220 according to the state of the H level of the control signal line 288. The first switch 210 and the second switch 220 switch the contacts according to the H signal output from the switching control unit 230, and change the connection state of the transmission line to the direct connection state.

In the state 520, when the USB cable 105 connected to the PC 21 is removed from the USB connector 152, the camera 10 transitions to the state 510. When the USB cable 105 is removed from the USB connector 152 in the state 520, the power supply line 188 becomes the L level and the control signal line 288 becomes the L level. The switching control unit 230 outputs an L signal to the first switch 210 and the second switch 220 according to the state of the L level of the control signal line 288. The first switch 210 and the second switch 220 switch the contacts according to the L signal output from the switching control unit 230, and change the connection state of the transmission line to the direct connection state.

In state 520, the PC 21 is directly connected to the external memory 180 via the USB cable 105, transmission line 111 and transmission line 181. Power is supplied to the external memory 180 from the PC 21 via the power supply line 118 and the power supply line 188. The PC 21 directly controls the external memory 180 to transmit data. For example, the external memory 180 responds to the PC 21 as a USB mass storage class device. The PC 21 accesses the external memory 180 according to the usage defined by the USB mass storage class. In this way, the PC 21 can directly access the external memory 180. That is, the PC 21 can directly access the external memory 180 even when the main part of the camera 10 is in a non-operating state.

When the power switch 14 is turned on in the state 520, the camera 10 transitions to the state 530 or the state 540 according to the user setting state. For example, if the currently set card access mode is the camera access mode, the state transitions to the state 530, and if the currently set card access mode is the external access mode, the state transitions to the state 540. Specifically, when the power switch 14 is turned on, the switching signal output unit 208 outputs an H signal when the currently set card access mode is the external access mode, and is currently set. When the card access mode is the camera access mode, the L signal is output.

In the state 530, the transmission line is in the direct connection state, and the main part of the camera 10 is in the operating state. In the state 530, the PC 21 can directly access the external memory 180 as in the state 520. For example, the PC 21 can access the external memory 180 without the need for control by the main part of the camera 10. Specifically, the PC 21 can access the external memory 180 without the need for control by the SoC200.

In the state 530, when the power switch 14 is turned to the OFF position, the state transitions to the state 520. Specifically, the main part of the camera 10 transitions from the operating state to the non-operating state while maintaining the direct connection state of the transmission line.

In the state 540, the transmission line is in the non-direct connection state, and the main part of the camera 10 is in the operating state. When transitioning from the state 520 to the state 540, the switching signal output unit 208 outputs an L signal. The switching control unit 230 outputs the L signal to the first switch 210 and the second switch 220 based on the L signal output from the switching signal output unit 208. As a result, the first switch 210 and the second switch 220 switch the contacts according to the L signal output from the switching control unit 230, and put the transmission line in the non-direct connection state.

In the state 540, the recording medium IF unit 201 can access the external memory 180 via the transmission line 186 and the transmission line 183. The external device IF unit 202 can transmit data to and from the PC 21 via the transmission line 116 and the transmission line 111. For example, the external device IF unit 202 transfers the image data read from the external memory 180 by the recording medium IF unit 201 to the PC 21 via the transmission line 116 and the transmission line 111. For example, when the camera 10 is connected to the PC 21 by PTP (Picture Transfer Protocol), the external device IF unit 202 receives a request acquired from the PC 21 via the transmission line 116 and the transmission line 111, and the recording medium IF unit 202. The image data read by 201 from the external memory 180 is transmitted to the PC 21.

In the state 540, when the power switch 14 is turned to the OFF position, the state transitions to the state 520. In this case, the main part of the camera 10 transitions from the operating state to the non-operating state while maintaining the direct connection state in the state of the transmission line.

In the state 540, when the USB cable 105 is removed, the state transitions to the state 550. In the state 550, the transmission line is in a non-direct connection state, the main part of the camera 10 is in an operating state, and the camera 10 is not connected to a device having a self-power supply. When transitioning from the state 540 to the state 550, the state of the transmission line and the operating state of the main part of the camera 10 are maintained. The camera 10 transitions to a state in which the USB connection with the PC 21 is released.

In the state 550, even if the communication accessory 22 is connected to the USB connector 152, the connection state of the transmission line does not change. In the state 550, when the USB cable 105 connected to the PC 21 is inserted into the USB connector 152, the camera 10 transitions to the state 530 or the state 540 depending on the user setting state. For example, if the currently set card access mode is the camera access mode, the state transitions to the state 540, and if the currently set card access mode is the external access mode, the state transitions to the state 530. When the potential change of the power supply line 118 due to the insertion of the USB cable 105 into the USB connector 152 is detected, the switching signal output unit 208 outputs an H signal when the currently set card access mode is the external access mode. If the currently set card access mode is the camera access mode, the L signal is output.

In the state 530, when the USB cable 105 connected to the PC 21 is removed from the USB connector 152, the camera 10 transitions to the state 550. When it is detected that the power supply line 188 has reached the L level due to the removal of the USB cable 105 from the USB connector 152, the switching signal output unit 208 outputs an L signal to the control signal line 288. As a result, the connection state of the transmission line is changed to the direct connection state.

FIG. 6 shows an example of the operation from the start to the end of the camera 10. This flow is started when the power switch 14 is switched from the OFF position to the ON position. This flow is executed by controlling each part of the camera 10 mainly by the camera MPU 140.

In step S600, the camera MPU 140 starts the initial setting of the camera 10. For example, the camera MPU 140 expands various parameters for controlling the camera 10 from the system memory 139 to the RAM 136. The camera MPU 140 performs initial settings of the camera 10 based on, for example, various developed system parameters. For example, the default imaging conditions are set based on the system parameters related to the imaging conditions. The system parameters include information that identifies the memory access mode described above.

Subsequently, a process when the power is turned on regarding the connection state with the external device 110 is performed (step S602). The process of step S602 will be described later.

Subsequently, in step S604, the camera MPU 140 causes the display unit 138 and the like to display the contents set in the initial settings. For example, the camera MPU 140 causes the display unit 138 to display information such as the determined default imaging conditions in various formats such as icon display.

Subsequently, in step S606, the event that has occurred is specified. Here, as events, an operation event that occurs in response to an operation on the operation input unit 141, a connection event that occurs when the external device 110 is connected to the USB connector 152, and a connection event that occurs when the external device 110 is removed from the USB connector 152. Take up the disconnection event that occurs. As the operation event, a setting event caused by operating the setting button, a shooting instruction event caused by pressing the release button fully, and a playback event caused by pressing the play button are taken up.

When a setting event occurs, a task in the setting mode is started and setting processing is performed according to the user operation (step S610). The setting process includes a process in which the user instructs the memory access mode. As the setting process, other processes such as setting imaging conditions can be exemplified. When the setting is changed in the setting process, the system parameter is changed according to the changed setting. The task in the setting mode ends when a predetermined operation such as a pressing operation of the release button is detected.

When it is determined in step S606 that a shooting instruction event has occurred, a shooting operation is performed (step S612). The process of step S612 includes a process until the image data is recorded in the external memory 180.

If it is determined in step S606 that a playback event has occurred, a playback mode task is launched to perform a playback operation according to the user's operation (step S614). Examples of the reproduction process include a process of displaying thumbnails based on the image data recorded in the external memory 180, a process of reproducing image data selected by the user, and the like. The operation in the playback mode ends when a predetermined operation such as a pressing operation of the release button is detected.

If it is determined in step S606 that a connection event has occurred, a process related to connection with the external device 110 is performed (step S616). The process of step S616 will be described later. If it is determined in step S606 that a disconnection event has occurred, a process relating to disconnection from the external device 110 is performed (step S618). The process of step S618 will be described later.

If it is determined in the determination of step S606 that no event has occurred, the process proceeds to step S620. When the processes of step S610, step S612, step S614, step S616, and step S618 are completed, the process proceeds to step S620. In step S620, it is determined whether or not to turn off the power. For example, it is determined that the power is turned off when the power switch 14 is switched to the OFF position, or when the state without user instructions continues for a predetermined period after the camera 10 starts operation.

When it is determined that the power is turned off, the process when the power is turned off is performed with respect to the connection state with the external device 110 (step S622). Subsequently, a process of stopping the power supply to each part of the camera 10 is performed (step S624), and this flow is terminated. If it is determined that the power is not turned off, the process shifts to step S606.

FIG. 7 shows a control flow for controlling the connection state of the transmission line when the camera 10 starts operation. The control flow of FIG. 7 can be applied to the process of step S602 of FIG.

In step S702, the connection state of the USB connector 152 is determined. If it is determined in step S702 that the PC 21 is connected, the currently set card access mode is determined (step S704).

If it is determined in step S704 that the currently set card access mode is the camera access mode, the switching signal output unit 208 outputs an L signal to set the transmission line state from the direct connection state. Switch to the direct connection state (step S706). Subsequently, a USB connection is established with the PC 21 (step S708), and the processing of this flow is completed.

In the determination of step S704, when the currently set card access mode is the external access mode, the state of the transmission line is maintained in the state of direct connection (step S710), and the processing of this flow ends. In step S710, the switching signal output unit 208 maintains the output of the H signal.

If it is determined in step S702 that the communication accessory 22 is connected, the state of the transmission line is maintained in the non-direct connection state (step S712), and the connection process with the communication accessory 22 is performed (step S714). ). In step S714, the external device IF unit 202 supplies electric power from the power supply 190 to the communication accessory 22 to establish a USB connection with the communication accessory 22. When the process of step S714 is completed, the process of this flow ends.

If it is determined in step S702 that the external device 110 is not connected to the USB connector 152, the state of the transmission line is maintained in the non-direct connection state (step S716), and the process of this flow ends.

FIG. 8 shows a control flow when the external device 110 is connected to the USB connector 152 when the camera 10 is operating. The control flow of FIG. 8 can be applied to the process of step S616 of FIG. In the control flow of FIG. 8, it is assumed that the external memory 180 is attached to the memory card connector 151.

In step S802, it is determined whether the external device 110 connected to the USB connector 152 is the PC 21 or the communication accessory 22. If it is determined in step S802 that the PC 21 is connected to the USB connector 152, the currently set card access mode is determined (step S804).

If it is determined in step S804 that the currently set card access mode is the camera access mode, the state of the transmission line is maintained in the non-direct connection state (step S806), and the transmission line is connected to and from the PC 21. Establish a USB connection (step S808). In step S806, the switching signal output unit 208 maintains the signal output to the control signal line 288 at the L level. When the process of step S808 is completed, the process of this flow ends.

If it is determined in step S804 that the currently set card access mode is the external access mode, the transmission line state is switched from the non-direct connection state to the direct connection state (step S810). End the flow processing. In step S810, the switching signal output unit 208 switches the signal output to the control signal line 288 from the L level to the H level. When the state of the transmission line is switched from the non-direct connection state to the direct connection state, the PC 21 establishes a USB connection with the external memory 180, and the PC 21 can directly access the external memory 180. For example, the PC 21 can access the external memory 180 by the procedure defined by the mass storage class.

If it is determined in step S802 that the communication accessory 22 is connected to the USB connector 152, a USB connection with the communication accessory 22 is established (step S812), and the process of this flow ends. In step S812, the connection state of the transmission line is not changed.

FIG. 9 shows a control flow when the external device 110 is removed from the USB connector 152 when the camera 10 is operating. The control flow of FIG. 9 can be applied to the process of step S618 of FIG. In the control flow of FIG. 9, it is assumed that the external memory 180 is attached to the memory card connector 151.

In step S902, it is determined whether the external device 110 removed from the USB connector 152 is the PC 21 or the communication accessory 22. If it is determined in step S902 that the PC 21 has been removed from the USB connector 152, it is determined whether the current connection state of the transmission line is a direct connection state or a non-direct connection state (step S904). ..

If it is determined in step S904 that the current connection state of the transmission line is the direct connection state, the state of the transmission line is changed to non-direct connection (step S906). Specifically, the switching signal output unit 208 sets the signal level of the control signal line 288 to the L level. Subsequently, the recording medium IF unit 201 establishes a connection with the external memory 180 (step S908), and ends this flow. In step S908, the recording medium IF unit 201 establishes a connection with the external memory 180 according to the procedure defined by the PCI Express standard.

If it is determined in step S904 that the current connection state of the transmission line is a non-direct connection state, the external device IF unit 202 performs a process of terminating the USB connection with the PC 21 (step S910). , End this flow. In step S910, the external device IF unit 202 releases the internal resources used for the USB connection with the PC 21.

If it is determined in step S902 that the communication accessory 22 has been removed from the USB connector 152, the external device IF unit 202 performs a process of terminating the connection with the communication accessory 22 (step S912), and ends this flow. .. In step S912, the external device IF unit 202 releases the internal resources used for the USB connection with the communication accessory 22.

FIG. 10 shows a processing flow when controlling the connection state of the transmission line when the camera 10 ends its operation. The flow of FIG. 10 can be applied to the process of step S622 of FIG.

In step S1002, it is determined whether or not the PC 21 is connected by USB. If it is determined in step S1002 that the PC 21 is connected to the USB via USB, it is determined whether the current connection state of the transmission line is a non-direct connection state or a direct connection state (step S1004).

If it is determined in step S1004 that the current connection state of the transmission line is a non-direct connection state, the external device IF unit 202 terminates the USB connection with the PC 21 (step S1006). Subsequently, the connection state of the transmission line is changed to the direct connection state (step S1008), and the processing of this flow is completed.

If it is determined in step S1004 that the current connection state of the transmission line is the direct connection state, the process of this flow is terminated while maintaining the direct connection state (step S1010).

If it is determined in step S1002 that the PC 21 is not connected by USB, the process of this flow is terminated while maintaining the current connection state of the transmission line in the non-direct connection state (step S1012). The process at the time of power off described in relation to this flow can be applied even when the power supply 190 is removed.

FIG. 11 shows the processing of the camera 10 when the PC 21 is connected to the USB connector 152 when the camera 10 is not operating. In the control flow of FIG. 11, it is assumed that the external memory 180 is attached to the memory card connector 151.

When the PC 21 is connected to the USB connector 152, the current connection state of the transmission line is changed to the direct connection state (step S1102). Specifically, the connection state of the transmission line is switched to the direct connection by raising the control signal line 288 to the H level by the voltage given from the PC 21 via the power supply line 188. Power is supplied from the PC 21 to the external memory 180 via the power supply line 118 and the power supply line 188.

When the connection state of the transmission line becomes the direct connection state, the PC 21 establishes a USB connection with the external memory 180, and the PC 21 can directly access the external memory 180. For example, the PC 21 can access the external memory 180 by the procedure defined by the mass storage class.

In the description in FIG. 5 and the like, switching of the power switch 14, connection of the external device 110, and removal of the external device 110 have been taken up as examples of factors for transitioning the state. However, the state may be changed according to the instruction of the user. For example, the camera MPU 140 gives an instruction to the user to select whether to access the external memory 180 by mass storage or by PTP in the state where the main part of the camera 10 is operating by operating the operation input unit 141. It may be obtained from the user based on. When the instruction that the external memory 180 should be accessed by the mass storage is acquired, the connection state of the transmission line may be changed to the direct connection state, and the power of the camera 10 may be turned off. When the instruction that the external memory 180 should be accessed by PTP is acquired, the connection state of the transmission line is changed to the non-direct connection state, and the recording medium IF unit 201 establishes communication with the external memory 180 by PCT Express. The image data acquired from the external memory 180 via the recording medium IF unit 201 may be transmitted to the PC 21 by the external device IF unit 202.

Further, each part of the digital camera 10 can be supplied with electric power independently of the power supply 190, and may be able to operate independently of each other. For example, the main part of the camera 10 including the cameras MPU140, ASIC135 and SoC200 and the switching control part 230 can be supplied with electric power independently from the power supply 190 and may operate independently of each other. Then, as described above, each part of the camera 10 may be operated independently according to the connection state of the transmission line. Further, it may have an independent power supply for driving the switching control unit 230. The power source for driving the switching control unit 230 may be a power source having a capacity smaller than that of the power source 190.

In the above description, it is assumed that the switching control unit 230 controls the first switch 210 and the second switch 220. However, the function of switching the connection state of the transmission line may be realized by a physical switch that is manually switched by the user.

In the above description, the process described as the operation of the camera MPU 140 is realized by the camera MPU 140 controlling each hardware of the camera 10 according to a program. Similarly, the processing realized by the ASIC 135, the SoC 200 and the switching control unit 230 in the above description can be realized by the processor. That is, in the process described in relation to the camera 10 of the present embodiment, the processor operates according to the program to control each hardware, so that each hardware including the processor, memory, and the like cooperate with the program. It can be realized by operating. That is, the process can be realized by a so-called computer device. The computer device may load a program that controls the execution of the above-described processing, operate according to the read program, and execute the processing. The computer device can load the program from a computer-readable recording medium that stores the program.

Further, in the present embodiment, as an example of the image pickup apparatus, the camera 10 including the lens unit 120 and the camera body 130 is taken up. However, the image pickup apparatus is a concept including a camera body 130 that does not include the lens unit 120. The imaging device may be an interchangeable lens camera such as a single-lens reflex camera, or a non-interchangeable lens camera. The image pickup device may be a video camera. The image pickup device may be any electronic device having an image pickup function, such as a mobile phone with an image pickup function or a portable information terminal with an image pickup function. Although the PC 21 and the communication accessory 22 have been taken up as an example of the external device connected to the USB connector 152, the external device 110 is not limited to the PC 21 and the communication accessory 22, and various devices can be applied. Further, the USB connector 152 is an example of a connection portion, and various connectors for connecting various external devices can be applied as the connection portion. Further, although the external memory 180 is taken up as an example of the external device connected to the memory card connector 151, various devices can be applied to the external device connected to the memory card connector 151. Further, the memory card connector 151 is an example of a connection portion, and various connectors for connecting various external devices can be applied as the connection portion.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

The order of execution of operations, procedures, steps, steps, etc. in the devices, systems, programs, and methods shown in the claims, specification, and drawings is particularly "before" and "prior to". It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

5 camera system, 10 cameras, 14 power switch, 21 PC, 22 communication accessories, 105 USB cable, 110 external device, 118 power line, 120 lens unit, 121 lens mount contact, 122 lens group, 123 lens MPU, 124 lens drive Unit, 130 camera body, 131 camera mount contact, 132 imaging element, 133 analog processing unit, 134 A / D converter, 135 ASIC, 136 RAM, 137 display control unit, 138 display unit, 139 system memory, 140 camera MPU, 141 operation input unit, 142 AF unit, 143 focal plane shutter, 144 photometric element, 145 main mirror, 146 sub mirror, 147 pentaprism, 148 drive unit, 149 connection interface, 151 memory card connector, 152 USB connector, 160 transmissive display Panel, 161 focus plate, 162 eyepiece optical system, 163 finder window, 180 external memory, 111, 116, 181, 183, 186 transmission line, 188 power line, 190 power supply, 192 power supply circuit, 194 power supply line for switching control, 196 Resistance, 200 SoC, 201 Recording medium IF section, 202 External device IF section, 208 switching signal output section, 210 1st switch, 220 2nd switch, 211, 212, 222, 222 contacts, 230 switching control section, 240 switching controller , 250 internal connection line, 288 control signal line, 310 PCIeIF part, 320 USBIF part, 330 memory part, 340 controller part, 350 connector, 510, 520, 530, 540, 550 status

Claims (5)

With the first connection
2nd connection and
Data is transmitted to and from the storage medium connected to the first connection portion through the first connection portion, and data is transmitted to and from an external device connected to the second connection portion through the second connection portion. And the transmission unit that transmits
The first state in which the data transmission line connected to the second connection unit is connected to the data transmission line connected to the first connection unit via the transmission unit, and the data transmission connected to the second connection unit. A control unit for switching between a second state in which the line is connected to a data transmission line connected to the first connection unit without going through the transmission unit is provided.
The control unit can receive power from the external device, and when it cannot supply power to the storage medium, it puts it in the second state.
Electronics. The first connection part connected to the first transmission line,
The second connection part connected to the second transmission line,
A transmission unit that transmits data and
The first state in which the first transmission line and the transmission unit are connected and the second transmission line and the transmission unit are connected, and the first transmission line and the second transmission without going through the transmission unit. It is equipped with a switching unit that switches between the second state in which the line is connected.
An electronic device that can receive electric power from the second connection unit and puts the switching unit into the second state when electric power cannot be supplied to the first connection unit. A storage medium is detachably connected to the first connection portion, and the storage medium is detachably connected to the first connection portion.
The electronic device according to claim 2, wherein an external device is detachably connected to the second connection portion. The transmission unit transmits data to and from the storage medium connected to the first connection unit by a protocol selected from the first protocol and the second protocol, and is connected to the second connection unit. The electronic device according to claim 1 or 3, wherein data is transmitted to and from an external device by the second protocol. The electronic device according to claim 4, wherein when the second state is switched, data is transmitted between the storage medium and the external device by the second protocol.

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