JPS63690A - Card shape memory device - Google Patents

Abstract

PURPOSE:To continuously hold a stored data of a memory by loading a battery charger and a solar battery, so that power can be supplied to a memory from this power source, even when power is not supplied from the outside. CONSTITUTION:A button type battery charger 30 and a solar battery 31 are loaded on a base material 9. The battery charger 30 is connected to a control part 18 supplies power to each part of a card shape storage device. Usually, when the power generation quantity is obtained enough from its solar battery 31, it is operated as a storage holding power source of a RAM 10 and a charging power source of the battery charger, and when the power generation quantity cannot be obtained enough from the built-in solar battery 31, the built-in battery charger is operated as the storage holding power source of the RAM 10. In this way, the stored data can be held continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a card-type storage device equipped with a semiconductor element such as a memory that electrically stores information.

[Prior Art] FIG. 5 is a perspective view of a conventional card-type storage device disclosed in, for example, Japanese Patent Publication No. 56-19665, and (a)
(b) when the terminal group (20) described below is provided.
shows the case where these terminal groups (20) are not provided. FIG. 6 is a block diagram showing the electrical configuration of the card type storage device shown in FIG. In the figure, (11) is a writable read-only memory (hereinafter referred to as FROM). This F ROM (11) is configured similarly to a general-purpose FROM, and the address gate (11) for the F ROM (11) is
12), a data gate (13), and an address latch (14) and a data latch (15) that hold the address signal and data signal from the address gate (12) and delta gate (13) for a period of time, respectively. , F.R.O.
A read gate (16) for reading data from M (11) and a write gate (1) for writing data.
7), these FROM (11), read gate (16)
) - write gate (17), address latch (14)
, a control section (18) that controls the operation of the data latch (13).
) and an inverter (19) that energizes either the address gate (12) or the data gate (13). Furthermore, terminals (21) to (24) of the terminal group (20) are input/output terminals for addresses and data (signals).

The terminal (25) is a signal input terminal for address and data switching. Terminal (26) is a signal input terminal for switching between writing and reading, and terminals (27) and (28)
) is a power supply terminal for supplying power to the control unit (18).

Next, write and read operations will be explained. First, the write operation will be explained with reference to the timing diagram of FIG. As shown in A, an address signal is supplied to the terminals (21) to (24) at time a, and at the same time, as shown in B, a low level (hereinafter referred to as below) signal is supplied to the address and data switching terminal (25). supply

At this time, writing is performed.

The write/read switching terminal (26) is always held at rlJ as shown in E, and the control unit (18) is set for write operation. Therefore, the address gate (12) opens in response to the rLJ signal at the terminal (25), and C
As shown in , the address signal is held in the address latch (14) at time C by the control unit (18).

Next, the signals that have been applied to terminals (21) to (24) at one time are switched from address signals to data signals as shown in B, and at the same time, terminal (25) is also at a high level (hereinafter referred to as H).
) signal, closes the address gate (12) and opens the data gate (13). As shown in D, time d
At this time, the data signal is held in the data latch (15) by a signal from the control unit (18).

Then, as shown in F, at time f, the control unit (18)
is the F addressed from the address latch (14)
Data is written into the ROM (11) from the data latch (15) through the read gate (17). Then, a clear pulse is applied to each address latch (1
4) Send it to the data latch (15), erase the held address and data signals, and complete the write operation.

Next, the read operation will be explained with reference to the timing chart shown in FIG. An rHJ signal corresponding to readout is applied to the terminal (26) as shown in E. first,
At time a, an address signal corresponding to the data to be read is applied to the terminals (21) to (24), and the address and data switching terminal (25) are simultaneously set to the rLJ signal level.

Thereafter, the control unit (18) applies a latch pulse to the address latch (14) at time C as shown in C, and holds the address signal therein. This allows FROM(
11), the address of the data to be read is specified, so an "H" signal is already supplied to the switching terminal (25). Therefore, the address gate (12) indicates, and in response to a signal sent from the control unit (18) to the read gate (16), the data at the specified address from the PROM (11) is transferred to the terminals (21) to (24). Only during the timing period during which the information is supplied and processed by the information processing device is read out continuously as shown in B, and a clear pulse is sent from the control unit (18) to the address latch (14) as shown in H to complete the reading operation. do.

[Problems to be Solved by the Invention] Conventional card-type storage devices are configured as described above, so when updating data, it is necessary to either erase the data stored in the memory using a special erasing device, or Or, the card must be replaced with a new one, and depending on the structure of the card, it may be difficult to erase the card, or the memory element may be scratched or stained, making erasing impossible. There was a problem.

This invention was made to solve the above-mentioned problems, and it is possible to easily write data to the memory, read data from it, and update the device, and it also allows the stored data to be retained continuously. The purpose is to obtain a card-type storage device that can be used.

[Means for Solving the Problems] A card-type storage device according to the present invention stores data stored in a random access memory in which data can be written and read even when no power is supplied from the outside. In order to store the memory and its data, a rechargeable battery and a solar cell capable of supplying power to the random access memory are disposed on the base material.

[Function] In the card-type storage device of the present invention, power for retaining data stored in the memory is constantly supplied to the memory and each part related thereto from the outside or from the rechargeable battery and solar cell.

[Example 1] An example of the present invention will be described below with reference to the drawings. 1st
The figure is a perspective view of a card-type storage device of the present invention. The base material (9) includes a button-shaped rechargeable battery (30) and a solar cell (3).
1) is installed. FIG. 2 is a block diagram showing the electrical configuration of the card-type storage device of the present invention. Here, FIG. 1(a) shows the case where the terminal group (20) is provided, and FIG. 1(b) shows the case where these are not provided. Second
In the figure, (10) is a writable and readable random access memory (hereinafter referred to as RAM).

This RAM (10) is constructed in the same way as a general-purpose RAM that is generally available on the market, and includes an address gate (12) and a data gate (13) for the S RAM (10), and these address gates (12), Data Gate (13
), an address latch (14) and a data latch (15) that hold the address signal and data signal from the RAM (10) for a predetermined period, respectively, a read gate (16) for reading data from the RAM (10), and a read gate (16) for writing data. write gate (17) for these RAM (
10), read gate (16), write gate (1
7), address latch (14), data latch (15)
a control unit (18) that controls the operation of the controller;

Address gate (12) or data gate (13)
). Furthermore, terminals (21) to (24) of the terminal group (20) are input/output terminals for addresses and data (signals). Terminal (
25) is a signal input terminal for address and data switching.

The terminal (26) is a signal input terminal for switching between writing and reading, and the terminals (27) and (28) are power supply terminals for supplying power to the control section (18). Rechargeable battery (30)
is a battery that is connected to the control unit (18) and supplies power to each part of the card-type storage device. (31) is a solar cell, and normally, when sufficient power generation is obtained from this solar cell (31), it serves as a power source for memory retention of RAM (10).

The built-in rechargeable battery (30) operates as a power source for charging the rechargeable battery (30), and when sufficient power generation cannot be obtained from the built-in solar battery (31), the built-in rechargeable battery (30) retains the memory of RAM (10). Operates as a power supply for

Next, the write and read operations of the card type storage device of the present invention having the above configuration will be explained.

First, the write operation will be explained with reference to FIG.

In Fig. 3, as shown by A, the terminal (2nd stage) is connected at time a.
An address signal is supplied to (24), and at the same time, rL is supplied to the address and data switching terminal (25) as shown in B.
Supply J signal. At this time, since writing is performed, the terminal for switching between writing and reading (2
6) is held at rLJ as shown in E, and the control unit (18
) is set for write operation. Therefore, the terminal (
The address gate (12) opens in response to the "L" signal of 25), and the address signal is held in the address latch (14) at time C by the control section (18) as shown in C. Next, the address signal, which was already applied to the terminals (21) to (24) at one time, changes to a data signal as shown in B, and at the same time, the switching terminal (25) switches to an "H" signal. Close the address gate (12) and open the data gate (13). As shown in D, at time d, the control unit (18)
The data signal is held in the data latch (15) by a signal from the data latch (15).

Then, as shown in F, at time f, the control unit (18)
is the R addressed from the address latch (14)
Data is written into A M (10) from the data latch (15) through the read gate (17). Then, at the timing shown in H, the control unit (18) sends a clear pulse to each address latch (14) and data latch (15), erases the held address and data signals, and completes the write operation.

Next, the read operation will be explained with reference to the timing chart shown in FIG. An rHJ signal corresponding to readout is applied to the terminal (26) as shown in E. first,
At time a, an address signal corresponding to the data to be read is applied to the terminals (21) to (24), and the address and data switching terminal (25) are simultaneously set to the rLJ signal level.

Next, the control unit (18) applies a latch pulse to the address latch (14) at time C, as shown in C, to hold the address signal therein. This allows RAM (
10) indicates the address of the data to be read, so the rHJ signal is already supplied to the switching terminal (25). Therefore, the address gate (12) indicates, and in response to a signal sent from the control unit (18) to the read gate (16), the data at the specified address from the RAM (10) is transferred to the terminals (21) to (24). Only during the timing period during which the information is supplied and processed by the information processing device is read out continuously as shown in B, and a clear pulse is sent from the control unit (18) to the address latch (14) as shown in H to complete the reading operation. do.

During the write operation and read operation as described above, the control unit (18) externally supplies the power necessary for the operation to the RAM (10), address latch (14), and data latch (15), and performs the write operation and read operation. When a read operation is not being performed, the control unit (18) similarly switches the power to the built-in rechargeable battery (30) and solar battery (31) to provide power for data retention in the RAM (10). R
A M (10).

Alternatively, the power supply may be switched by detecting the presence or absence of an external power supply.

[Effects of the Invention] As described above, according to the present invention, a card-type storage device is equipped with a rechargeable battery and a solar cell, and even when power is not supplied from the outside, power is supplied from this power source to the memory. Since the data stored in the memory can be continuously retained and the data can be updated as needed, the usefulness of the device can be increased, and the power source can be powered by solar cells. Since the information is backed up, it has the effect of extending the usage period over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a card-type storage device according to an embodiment of the present invention, FIG. 2 is a block diagram of the card-type storage device shown in FIG. 1, and FIGS. FIG. 5 is a perspective view of a conventional card-type storage device, FIG. 6 is a block diagram of the card-type storage device shown in FIG. 5, and FIGS. FIG. 3 is a timing diagram of the operation of the card-type storage device shown in the figure. In the figure, (8) is the control unit, (9) is the base material, (10)
is RAM (Random Access Memo January), (30) is a rechargeable battery, and (31) is a solar cell. Note that the same reference numerals in Figure 1 indicate the same or equivalent parts.

Claims (1)

[Claims] When updating or erasing stored data, a card-type storage device that is connected to a predetermined device, receives power, and is updated or erased. An access memory, a control unit for controlling the writing and reading to the random access memory, a rechargeable battery for maintaining data storage in the random access memory, and a solar cell for supplying charging current to the rechargeable battery. The random access memory, the control unit, and the rechargeable battery are arranged in a card-shaped base material, and a solar cell is provided on the base material, and when installed in the predetermined device, the random access memory, the control unit, and the rechargeable battery are arranged in a card-shaped base material. What is claimed is: 1. A card-type storage device, characterized in that the data storage contents of the random access memory are held by the rechargeable battery and the solar cell except when the card is attached.