JPH0782467B2 - Electronic device with integrated circuit cartridge - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device in which a plurality of integrated circuit cartridges are removably mounted, and particularly, an integrated circuit cartridge in which the integrated circuit cartridges are selected and made accessible. It is related to the electronic device with.

(Prior art) In recent years, IC cards with built-in one-chip microcomputers and memory cards with built-in ROM (Read Only Memory) or RAM (Random Access Memory) are cash cards, credit cards, ID cards, and health cards. Widely used in various fields such as medical records and telephone cards,
It is widely used as a powerful portable information medium.

In particular, since the above memory card can secure a relatively large memory capacity, does not require a dedicated interface, and is inexpensive, the memory card is used by appropriately replacing it in various modern electronic devices according to the use and purpose. .

The memory card is provided with one male connector (or female connector). By connecting this male connector (or female connector) to a female connector (or male connector) provided in an electronic device, both connectors are provided. Data is read from the memory card via the computer and written to the memory card, and a large amount of data to be stored in a hard disk or a magnetic tape as an external storage device connected to a large computer can be stored. When it is desired to store the data in the memory card or to store the data to be stored in different memory cards for each data classified according to the content, it is necessary to connect a plurality of memory cards to the electronic device at one time.

(Problems to be Solved by the Invention) When it becomes necessary to connect a plurality of memory cards to an electronic device at a time as described above, a plurality of memory cards should be connected to a plurality of connectors respectively provided in the electronic device. It is possible to connect.

However, at present, the address setting of the memory card is fixed and unified into one type, so that a plurality of memory chips exist for the same address, which causes inconvenience.

In order to eliminate this inconvenience, it is only necessary to use multiple types of memory cards with different memory address settings, but the versatility and lack of flexibility of the memory card makes it difficult to set the desired address. Selected memory card and lacking flexibility, having to select and obtain the memory card set to the desired address, manufacturers need to produce multiple types of memory cards and memory There is a problem that the management of the card becomes complicated and the manufacturing cost becomes high.

(Object of the Invention) An object of the present invention is to provide an electronic device with an integrated circuit cartridge in which memories of a plurality of integrated circuit cartridges can be selected and made accessible, and a versatile integrated circuit cartridge can be applied. .

(Means for Solving Problems) An electronic device with an integrated circuit cartridge according to the present invention includes a plurality of integrated circuit cartridges having at least an integrated circuit as a memory, and the plurality of integrated circuit cartridges are detachably connected. In the electronic device, each of the integrated circuit cartridges receives a plurality of memory designating signals supplied from the electronic device at a plurality of input terminals, and based on a preset truth value table, depending on a combination of the memory designating signals. A decoder for outputting a memory select signal having a different pattern to a plurality of output terminals, and a switch means that can be externally set and operated, and one of the plurality of output terminals of the decoder is connected to a chip select terminal of the memory. And a switch means for connecting alternatively, in the electronic device via a plurality of memory designation signals Then, a plurality of integrated circuit cartridges are selected and made accessible.

(Operation) An electronic device with an integrated circuit cartridge according to the present invention is an electronic device that includes at least a plurality of integrated circuit cartridges having an integrated circuit as a memory, and the plurality of integrated circuit cartridges are detachably connected. In an electronic device with an integrated circuit cartridge, each integrated circuit cartridge includes a decoder and a switch means. The decoder receives a plurality of memory designating signals supplied from an electronic device at a plurality of input terminals, and based on a preset truth value table, outputs a plurality of memory select signals having a pattern corresponding to a combination of the memory designating signals. Output to the output terminal. An externally switchable switch means selectively connects one of the output terminals of the decoder to the chip select terminal of the memory of the integrated circuit cartridge.

That is, in each integrated circuit cartridge, the decoder outputs a memory select signal having a pattern corresponding to a combination of a plurality of memory designating signals, and through the switch means,
When the "H" level signal of the memory select signal is supplied to the chip select terminal of the memory, the memory of the integrated circuit cartridge can be accessed, and
When the "L" level signal of the memory select signal is supplied to the chip select terminal of the memory, the memory becomes inaccessible.

Since the switch means of the plurality of integrated circuit cartridges connected to the electronic device are set at mutually different positions, a plurality of memory designating signals of a combination suitable for the desired setting of the switch means of the integrated circuit cartridge are sent from the electronic device. By supplying the "H" level signal to the chip select terminal via the memory select signal supplied from the decoder, the desired integrated circuit cartridge can be selected and accessed.

(Effects of the Invention) According to the electronic device with integrated circuit cartridge of the present invention, as described above, each integrated circuit cartridge having at least an integrated circuit as a memory is provided with a decoder and a switch means, and a plurality of electronic devices are provided in the electronic device. With the integrated circuit cartridge installed, through multiple memory designation signals,
Since a plurality of integrated circuit cartridges are selected and made accessible, respectively, even when a plurality of identical integrated circuit cartridges are mounted, each integrated circuit cartridge can be selected and accessed. Therefore, the versatility and flexibility of the integrated circuit cartridge can be secured, and the manufacturing cost of the integrated circuit cartridge and its management are advantageous.

(Example) Hereinafter, the Example of this invention is described, referring drawings.

First, a configuration of a memory card equipped with a RAM (random access memory) and an example of mounting the memory card in an electronic device will be described.

As shown in FIG. 1 and FIG. 2, the memory card 1 is a card having a length and width of 52 mm × 86 mm and a thickness of several mm, and is a 1-chip static RAM (8K Byte) 2 and a backup battery 3 for storing the data written in the RAM 2
A card edge type female connector 4 and a male connector 5 provided with terminals of 30 poles, an address setter 6 for selectively setting an address, and 16 address buses 9 of AB _{0 to} AB ₁₅ . It is composed of eight data buses 10 of DB _{0 to} DB ₇ , a control bus 11 including read / write signal lines, and a plastic case for protecting the memory card 1.

The male connector 5 is provided at one end in the longitudinal direction of the memory card 1 and is detachably connected to a card edge type female connector provided in an electronic device 12 such as a typewriter, printer or personal computer. The connector 4 is provided at the other end of the memory card 1 and is configured so that the male connectors of the same type of memory card 1 can be detachably connected in series.

The address setter 6 is a decoder chip (IC chip) 7
And a rotary type changeover switch 8 for selectively changing eight positions from the first position a to the eighth position 8h.

The decoder chip 7 is provided with three input terminals A ₀ , A ₁ and A ₂ , eight output terminals O _{0 to} O ₇ and two grounded E ₁ and E ₂ enable terminals. Cage, each terminal A ₀ , terminal
A _1, inner AB _13, AB ₁₄ of the terminal A ₂ 16 two address bus 9,
AB ₁₅ is connected to each terminal, each terminal O ₀ , terminal O ₁ , ...
The output line from O ₇ is the first position a of the changeover switch 8,
The second position b is connected to the eighth position h, and the output line from the common terminal i is connected to the terminal CS (chip select) of the RAM2.

The change-over operation portion of the change-over switch 8 (which corresponds to the switch means) is positioned so as to face the rectangular hole provided in the plastic case, and in the direction perpendicular to the plane of FIG. It is configured to be switchable over the position h.

Address bus 9 (AB _{0 to} AB ₁₅ ) and data bus 10 (D
B _{0 to} DB ₇ ) and the control bus 11 are wired between the female connector 4 to the male connector 5 and the RAM 2 (however, AB _{0 to} A of the address bus 9).
B ₁₂ are wired) in RAM 2, the memory card 1 is connected to the electronic device 12, the address bus of the electronic apparatus 12 CPU (central processing unit) 13, a data bus, a control bus of the memory card 1 The respective address buses 9, data buses 10 and control buses 11 are connected via male / female connectors 4 and 5. Although not shown, the Vcc line and GND of the electronic device 12
And lines are connected to the memory card 1.

Next, the operation when the memory area of the memory card 1 is selected by the address setter 6 will be described.

Each address of 8 Kbytes of RAM2 is selected by the data of the 13 address buses 9 (AB _{0 to} AB ₁₂ ) and
The data of the address bus 9 (AB _{13 to} AB ₁₅ ) (which correspond to a plurality of memory designating signals) are decoded by the decoder chip 7 according to the truth values shown in the following Table 1, and terminals O ₀ to
An "L" level signal is output from any one terminal of O ₇ . The signal output from the decoder chip 7 to the output terminals O ₀ to O ₇ corresponds to the memory select signal.

That is, the memory map of the electronic device 12 and the control program provide 64 Kbytes from the address at which the memory area for the memory card 1 exists, and the CPU 13 causes the memory area for each 8 Kbyte of the RAM 2 in accordance with the output of address data. The chip select data of AB _{13 to} AB ₁₅ (address bus 9) for selecting is output based on the following Table 2.

Here, in the 64 Kbytes allocated for the memory card 1, when the changeover switch 8 is changed over to the first position (display of 1) a shown in FIG.
8K bytes up to are selected, and in the same way, if you switch to the second position (display of 2) b, 8K up to addresses "2000 to 3FFF"
When the byte is selected and switched to the 3rd position (display of 3) c, 8K bytes reaching the address "4000 to 5FFF" are selected,
If you switch to the 4th position (display of 4) d, the address "6000 ~
8K bytes up to "7FFF" are selected, 5th position (display of 5)
When switching to e, 8K bytes to address "8000-9FFF" are selected, and when switching to 6th position (display 6), 8K bytes to address "A000 to BFFF" are selected and 7th position (displaying 7). If you switch to g), the address will change from "C000 to DFFF".
Is selected, and when the eighth position (display of 8) h is switched, the 8 Kbytes reaching the addresses "E000 to FFFF" are selected. That is, the changeover switch 8 is set to the first position a to the eighth position.
The start address of RAM2 can be selected by switching to any of the positions h.

Next, the memory card 1 is replaced with three types of electronic devices 12A, 1
An example of adhesion in the case of attaching to 2B and 12C will be described based on FIG.

First, in the vicinity of the memory card 1 insertion slot of each electronic device 12A, 12B, 12C, the number of connected memory cards 1 and the memory card 1 are allocated by the memory allocation of each electronic device 12A, 12B, 12C.
Labels 14 that describe how to set the address setter 6
A, 14B and 14C are attached.

That is, as shown in FIG. 3A, the label 14A of the electronic device 12A is described as "Set one memory card and address setter to" 1 "", and the label 14B of the electronic device 12B is described. As shown in FIG. 3 (b), "one memory card, address setter set to" 2 ". When the expansion memory option is attached, the address setter of the second memory card is described as "3", and the label 14C of the electronic device 12C is as shown in Fig. 3 (c). , "One memory card, address setter set to" 3 "".

Next, the address setter 6 of the memory card 1 is set to "1" according to the contents of the label 14A attached to the electronic device 12A. Similarly for the electronic device 12B, the address setter 6 of the memory card 1 is set to "2" according to the contents of the label 14B, and the address setter 6 of the second memory card is set to "3". This second memory card 1 has a male / female connector 4
5 are connected in series. Similarly, for the electronic device 12C, the address setter 6 of the memory card 1 is set to "3" according to the contents of the label 14C.

Then, the memory card 1 with the address setter 6 set to “1” is mounted on the electronic device 12A, and each address setter 6
The memory card 1 in which is set to "2" and "3" is an electronic device.
The memory card 1 attached to 12B and having the address setter 6 set to "3" is attached to the electronic device 12C.

As described above, since the address of the memory card 1 can be selectively set by the address setter 6 according to the setting method displayed for each electronic device 12A, 12B, 12C, a plurality of memory cards 1 can be used. The same memory card 1 can be used also at the time of carrying out, a plurality of memory cards 1 can be selected and accessed, respectively, and the versatility and flexibility of the memory card 1 can be secured. Further, since it is sufficient to produce one type of the memory card 1, the memory card 1 can be manufactured at low cost, and management of the memory card 1 in the factory does not become complicated.
Also, when setting the address setting device 6 of the memory card 1, it can be set quickly and accurately without any confusion, and the preparation time until the memory card 1 is attached to each electronic device 12A, 12B, 12C and used can be shortened, Work efficiency is improved.

The labels 14A, 14B, 14C may be attached to an instruction manual or the like. Although the above embodiment has been described with respect to an example in which a memory card equipped with a RAM is applied to the electronic device 12, the present invention is applicable to a memory card or an IC card equipped with a ROM (read only memory), and a flat device. Of course, the same can be applied to the electronic device 12 in which a plurality of rectangular parallelepiped integrated circuit cartridges are mounted.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a plan view of a memory card, FIG. 2 is a wiring diagram inside the memory card, and FIG. 3 is a memory card in which an address setter is set for each electronic device. It is a figure explaining the example of wearing which wears. 1 ... Memory card, 2 ... RAM (random access memory), 6 ... Address setting device, 7 ... Decoder chip, 8 ... Changeover switch, 12.12A, 12B, 12C ... Electronic equipment, 14A・ 14B ・ 14C …… Label.

Claims (1)

[Claims] 1. An electronic device comprising a plurality of integrated circuit cartridges having at least an integrated circuit as a memory, wherein the plurality of integrated circuit cartridges are detachably connected, wherein each of the integrated circuit cartridges is supplied from the electronic device. A decoder for receiving a plurality of memory designating signals to a plurality of input terminals, and outputting a memory select signal having a pattern corresponding to a combination of the memory designating signals to a plurality of output terminals based on a preset truth value table, A switch means that can be set and operated from the outside, and a switch means that selectively connects one of a plurality of output terminals of the decoder to a chip select terminal of the memory; Multiple integrated circuit cartridges can be selected and accessed via multiple memory designation signals An electronic device with an integrated circuit cartridge characterized in that