JP6174082B2 - Peripheral device and method for controlling peripheral device - Google Patents

Description

  The present invention relates to a peripheral device connectable to a communication terminal capable of supplying power and a peripheral device control method.

  Japanese Unexamined Patent Application Publication No. 2011-164904 (Patent Document 1) discloses a peripheral device that reduces power consumption in a peripheral device connected to an external bus having a power supply line, and an operation method thereof.

  The peripheral device described in Japanese Patent Application Laid-Open No. 2011-164904 (Patent Document 1) is a peripheral device that operates by being connected to an external bus having a signal line capable of transmitting information and a power supply line capable of supplying power. In addition to the power of the power line of the external bus, the power supply that supplies power for operating the peripheral device, the power that is supplied from the power supply, and the information that is exchanged via the signal line The main device to be processed and the signal line status of the external bus are monitored, and when the loss of the signal in the signal line is detected, the signal line monitoring unit for stopping the power supply from the power supply device to the main device, and the external bus And a power supply control circuit that turns on / off the power supply from the power supply device to the signal line monitoring unit in accordance with the supply / stop of the power through the power supply line.

JP 2011-164904 A

  In the peripheral device described in Patent Document 1, since the control unit and the main device unit operate with power from the power supply device, the peripheral device is easily affected by power supply noise from the main device unit that consumes a large amount of power. Therefore, a voltage conversion circuit which is an additional cost is necessary.

  In addition, the monitoring unit of the peripheral device that does not have a power control circuit and the control unit and the main unit operate with the power of the power supply operates regardless of the power line state, and the stop processing from the connected device cannot be completed normally, etc. In addition, the initialization by power-on cannot be performed during the start process, and the stability of the operation of the control unit cannot be realized.

  An object of the present invention is to provide a peripheral device and a peripheral device control method capable of achieving both stability of a control unit and reduction of power consumption while suppressing an increase in cost.

(1)
The peripheral device according to one aspect is separate from an external bus connection port for connecting to an external bus having a signal line capable of transmitting information and a power line capable of supplying power, and power of the power line of the external bus. A power supply connection port for connecting to a power supply device that supplies power, a control unit that processes information exchanged via a signal line, a main device unit that processes information based on a signal from the control unit, and an external bus A first power control unit that controls power supply between the connection port and the control unit; and a second power control unit that controls power supply between the power connection port and the main device unit. The control unit operates with a voltage from the power line, and the main device unit operates with a voltage from the power supply device.

In this case, the external bus connection port and the control unit operate with a voltage by the power line at the external bus connection port, and the power supply connection port and the main device unit operate with a voltage by the power at the power supply connection port.
As a result, if power supply noise from the power supply connection port is entered, or noise caused by the main unit operating with the voltage from the connection port is generated, control is performed with the voltage from the power line from the external bus connection port. Since the unit can be operated, the operation of the control unit can be stabilized.
Even when the power of the control unit is large, the control unit receives power supply from the external bus connection port, so that the size of the power supply device connected to the power connection port can be reduced. Furthermore, since the control unit can be operated with the voltage from the external bus connection port, a voltage conversion circuit for operating with the voltage from the power supply connection port becomes unnecessary.

(2)
The peripheral device according to a second aspect of the present invention is the peripheral device according to one aspect, wherein the control unit monitors the state of the signal line of the external bus, and when the loss of the signal in the signal line is detected, the second power control unit You may cut | disconnect the electric power supply to a main apparatus part from a power supply connection port.

  In this case, when the signal is not sent from the signal line of the external bus connection port, the power in the main unit can be cut by the second power control unit, so that the power consumption can be further suppressed in the peripheral device. .

(3)
A peripheral device according to a third invention is the peripheral device according to the second invention, wherein when the power supply from the power supply connection port is cut off, the control unit controls the control unit from the external bus connection port by the first power control unit. The power supply to may be cut off.

  In this case, when the power supply from the power connection port is cut off, the power in the control unit can be cut by the first power control unit, so that the power consumption can be further suppressed in the peripheral device.

(4)
The peripheral device according to a fourth aspect of the present invention is the peripheral device according to the third aspect of the present invention from one aspect, wherein the external bus connection port may be a universal serial bus connection port.

  In this case, the external bus connection port is a universal serial bus (USB) connection port, and therefore has a supply power line. Therefore, it is possible to securely hold the power line.

(5)
A peripheral device control method according to another invention includes an external bus connection step of connecting to an external bus having a signal line capable of transmitting information and a power line capable of supplying power, and power of the power line of the external bus. A power supply connection step for connecting to a power supply device that supplies power separately from the power supply device, a control step for processing information exchanged via a signal line, a main device step for processing information based on a signal from the control step, and a control A first power control process for controlling power supply of the process and a second power control process for controlling power supply of the main apparatus process, wherein the control process operates with a voltage by the power line, and the main apparatus process includes: It operates with the voltage by the power supply device.

In this case, the external bus connection port and the control unit operate with a voltage by the power line at the external bus connection port, and the power supply connection port and the main device unit operate with a voltage by the power at the power supply connection port.
As a result, if power supply noise from the power supply connection port is entered, or noise caused by the main unit operating with the voltage from the connection port is generated, control is performed with the voltage from the power line from the external bus connection port. Since the unit can be operated, the operation of the control unit can be stabilized.
Even when the power of the control unit is large, the control unit receives power supply from the external bus connection port, so that the size of the power supply device connected to the power connection port can be reduced.
Furthermore, since the control unit can be operated with the voltage from the external bus connection port, a voltage conversion circuit for operating with the voltage from the power supply connection port becomes unnecessary.

It is a block diagram which shows an example of the peripheral device concerning embodiment. It is a schematic diagram which shows an example of the control method of a peripheral device.

[Embodiment]
Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments thereof. In the following description, the same reference numerals are assigned to the same components. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a block diagram illustrating an example of a peripheral device 100 according to the embodiment. In the present embodiment, the peripheral device 100 is composed of, for example, a hard disk device.

(Peripheral device 100)
As shown in FIG. 1, the peripheral device 100 includes a USB (Universal Serial Bus) connector 210, a first switch (SW) 220, a USB controller unit 230, a DC Jack connector 310, a second switch (SW) 320, and a main device 410. including.
In this embodiment, the USB connector 210 is exemplified, but the present invention is not limited to this, and communication terminals that can supply power (for example, USB, IEEE 1394, Display Port, HDMI (registered trademark), etc.) may be used. .

A USB (Universal Serial Bus) connector 210 and a DCJack connector 310 are provided on the outer appearance of the peripheral device 100 so as to be exposed.
The USB connector 210 is connected to an external device such as a personal computer (PC) 510 via a USB cable. The DC Jack connector 310 is connected to an AC adapter 520 connected to an AC outlet. The AC adapter 520 includes an AC-DC converter that converts 100V AC to DC voltage 12V.

A signal line and a power line of a USB (Universal Serial Bus) connector 210 of the peripheral device 100 are connected to a USB controller unit 230 via a first switch (SW) 220.
Further, the power line of the DCJack connector 310 is connected to the main apparatus 410 via the second switch (SW) 320.

The USB controller unit 230 instructs to switch the second switch (SW) 320. The USB controller unit 230 also instructs control of the main device 410.
The power line of the DCJack connector 310 instructs switching of the first switch (SW) 220.
Here, the main device 410 includes a hard disk drive (HDD), a display, and the like. When the main device 410 is a hard disk drive (HDD), information is written to, read from, or recorded in accordance with an instruction.

  In the area A in which the USB (Universal Serial Bus) connector 210, the first switch (SW) 220, and the USB controller unit 230 are arranged, the USB connector 210 is connected to the USB1. In the case of x and 2.0, operation is possible at 500 mA, operation is possible at 900 mA when the USB connector 210 is USB 3.0, and operation at 5000 mA is possible when the USB connector 210 is USB Power Delivery.

  Further, in the area B in which the DCJack connector 310, the second switch (SW) 320, and the main device 410 are disposed, the DCJack connector 310 can be operated with an arbitrary voltage. When the main device 410 is a hard disk drive (HDD), it can operate at 12V.

(Peripheral device control method)
Next, a method for controlling the peripheral device 100 will be described. FIG. 2 is a schematic diagram illustrating an example of a method for controlling the peripheral device 100.

(When PC510 is activated)
First, the first switch (SW) 220 gives a signal and power from the PC 510 to the USB controller unit 230 via the USB connector 210.
Next, when the signal of the signal line from the USB connector 210 is detected, the USB controller unit 230 turns on the second switch (SW) 320 and passes the power of the DC Jack connector 310. In addition, the USB controller unit 230 instructs the main apparatus 410 to write, read, and record information on the built-in magnetic disk.

(When PC510 is in sleep state)
The USB controller unit 230 switches the second switch so that the power supply to the main device 410 is turned off when the signal does not come to the signal line from the USB connector 210, for example, when the PC 510 is in the sleep state. (SW) 320 is turned off. As a result, the power consumed by the main device 410 can be reduced.

  Subsequently, when the PC 510 is in a sleep state and the power supply from the power supply line from the USB connector 210 is off, the power consumed in the USB controller unit 230 can be reduced.

(When PC510 returns from sleep mode)
The USB controller unit 230 monitors the signal on the signal line by supplying power from the USB connector 210. When the PC 510 returns from the sleep state, a signal is input to the signal line of the USB connector 210. In this case, the USB controller unit 230 turns on the second switch 320.
As a result, the peripheral device 100 can be operated smoothly.

As described above, in the peripheral device 100, the USB connector 210 and the USB controller unit 230 operate with a voltage by the power line input from the USB connector 210, and the DC Jack connector 310 and the main device 410 are input from the DC Jack connector 310. It operates with a voltage based on power.
As a result, even when power supply noise enters from the DCJack connector 310 or noise due to the main device 410 operating with the voltage from the connection port, the USB line 210 is connected with the voltage from the power line from the USB connector 210. Since the controller unit 230 can be operated, the operation of the USB controller unit 230 can be stabilized.
Further, even when the power of the USB controller unit 230 is large, the USB controller unit 230 receives power supply from the USB connector 210, so that the size of the AC adapter 520 connected to the DC Jack 310 can be reduced. Furthermore, since the USB controller unit 230 can be operated with the voltage from the USB connector 210, a voltage conversion circuit for operating with the voltage from the DC Jack connector 310 is not necessary.

  Further, when no signal is sent from the signal line of the USB connector 210, the power supplied to the main device 410 by the second switch 320 can be cut, so that power consumption can be further suppressed in the peripheral device 100. .

  Furthermore, when the power input from the DCJack connector 310 is cut, the power in the USB controller unit 230 can be cut by the first switch 220, so that the power consumption can be further suppressed in the peripheral device 100. .

(Correspondence between each component in the embodiment and each component in the claims)
In the present invention, the USB connector 210 corresponds to “external bus connection port, universal serial bus connection port, external bus connection step”, the DCjack connector 310 corresponds to “power supply connection port, power supply connection step”, and the USB controller unit 230. Corresponds to “control unit, control process”, main device 410 corresponds to “main device unit, main device process”, and first switch 220 corresponds to “first power control unit, first power control process”. The second switch 320 corresponds to “second power control unit, second power control step”, the voltage in region A corresponds to “voltage by power line”, and the voltage in region B becomes “voltage by power supply device”. The peripheral device 100 corresponds to the “peripheral device”.

  A preferred embodiment of the present invention is as described above, but the present invention is not limited thereto. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

DESCRIPTION OF SYMBOLS 100 Peripheral device 210 USB connector 220 1st switch 230 USB controller part 310 DCJack connector 320 2nd switch 410 Main apparatus

Claims (3)

An external bus connection port for connecting to an external bus having a signal line capable of transmitting information and a power line capable of supplying power;
A power connection port for connecting to a power supply that supplies power separately from the power of the power line of the external bus;
A control unit for processing information exchanged via the signal line;
A main unit that processes information based on signals from the control unit;
A first power control unit that controls power supply between the external bus connection port and the control unit;
A second power control unit for controlling power supply between the power connection port and the main device unit,
The control unit operates with a voltage by the power line, and the main device unit operates with a voltage by the power supply device,
The controller is
The power for monitoring the state of the signal line of the external bus and cutting off the power supply from the power connection port to the main unit by the second power control unit when the loss of the signal in the signal line is detected Including a control unit,
The control unit is a peripheral device in which power supply from the external bus connection port to the control unit is cut by the first power control unit when power supply to the power connection port is cut off . The peripheral device according to claim 1, wherein the external bus connection port is a universal serial bus connection port. An external bus connection step for connecting to an external bus having a signal line capable of transmitting information and a power line capable of supplying power;
A power connection step of connecting to a power supply that supplies power separately from the power of the power line of the external bus;
A control process for processing information exchanged via the signal line;
A main device process for processing information based on signals from the control process;
A first power control step for controlling power supply in the control step;
A second power control step for controlling the power supply of the main device step,
The control step operates with a voltage by the power line, and the main device step operates with a voltage by the power supply device,
The control step includes
The power for monitoring the state of the signal line of the external bus and cutting off the power supply from the power supply connection process to the main apparatus process by the second power control process when the loss of the signal in the signal line is detected Including the control process,
The control step is a peripheral device control method in which when the power supply in the power supply connection step is cut off, the power supply from the external bus connection step to the control step is cut off by the first power control step .

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