JPH0799538B2 - Plate storage medium - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a plate-shaped storage medium containing a semiconductor memory circuit.

(Prior Art) Due to recent advances in semiconductor technology, a plate-shaped storage medium that uses a readable / writable semiconductor storage circuit such as RAM or EEPROM is put to practical use as a cash card or a credit card instead of a magnetic card. Is about to be done.

However, such a storage medium is inconvenient because the written information cannot be read unless the data is printed out by setting it in a dedicated reading device.

As one method for solving such a problem, the present applicant has previously proposed a plate-shaped storage medium in which a semiconductor memory circuit and a display means for displaying data stored therein are integrated.

According to this device, the data stored in the semiconductor memory circuit can be read, which is convenient, but still there is a disadvantage that the user pays more than the balance due to carelessness.

(Purpose) The present invention has been made in view of such circumstances, and an object of the present invention is to issue an audible alarm to alert the user when the balance data becomes a certain amount or less. It is to provide a plate-shaped storage medium that can be used.

(Structure) Therefore, details of the present invention will be described below based on illustrated embodiments.

FIG. 2 shows an embodiment of the present invention. In the figure, reference numeral 11 is an alarm device comprising a buzzer 11a and a display element 11b, which is a characteristic part of the present invention. It is provided on the surface of a base 14 which is configured to operate by a signal and which contains a semiconductor memory circuit. A liquid crystal panel 9 for displaying information stored in a semiconductor memory circuit is provided at the center of the upper surface of the base 14, a power switch 12 for turning the power on and off, and key switches 4, 4 for switching display contents at the bottom.
, And contact pins A to H connected to the writing / reading device (shown in the same figure) are provided on the back surface.

FIG. 1 shows an embodiment of the circuit described above,
In the figure, reference numeral 1 is a one-chip microcomputer, and a CPU 1a that operates based on signals from contact pins A and B and a signal from a display control circuit 3 described later,
ROM1b that stores the control program and RAM that forms a register
1c, connected to other circuits via the data bus 2,
It is configured to control the entire apparatus. 3 is
The display control circuit is configured to output a code signal and control the one-chip microcomputer 1 by operating the key switches 4, 4, ... Provided on the surface of the base 14. A serial / parallel interface 5 transmits / receives data to / from the writing / reading device via the contact pins C and D, and is configured to convert data from the writing / reading device to serial / parallel. Reference numeral 6 denotes a semiconductor memory circuit such as an EEPROM for storing data. The memory control circuit 7 controlled by a signal from the 1-chip microcomputer 1 writes and reads data and outputs it to the data bus 2. ing. A display driver 8 is configured to convert the data read from the EEPROM 6 by the one-chip microcomputer 1 into a character pattern signal and output it to the liquid crystal display panel 9 to make it visible information.
Reference numeral 10 denotes a balance alarm circuit which is a characteristic part of the present invention, and outputs a signal when the balance data output from the 1-chip microcomputer 1 falls below a preset reference amount to output a buzzer 11a or a liquid crystal display element 11b. Is configured to drive the alarm device 11 consisting of. Reference numeral 13 is a battery that supplies drive power to the above circuits via the power switch 12.

In this embodiment, a card writing / reading device (not shown) is set, and necessary information is written in the semiconductor memory circuit 6 through the serial / parallel interface 5.
When confirming the information of the plate-shaped storage medium in which the information is written in this way, a power switch provided on the surface of the base 14
When 12 is turned on, the internal circuit receives power from the battery 13 and becomes operable. If the key switches 4 and 4 are operated at this point, the code signal from the display control circuit 3 is input to the one-chip microcomputer 1 and the semiconductor memory circuit 6 is operated to store one plane of stored information in the data bus. The data is output to the display driver 8 via 2 and the data is displayed on the liquid crystal panel 9 as shown in FIG. At the same time, the data read on the data bus 2 is also input to the balance warning circuit 10 and compared with the reference amount. If the balance is below the reference amount at this point, the balance alarm circuit 10 outputs a signal to activate the alarm device 11 to issue an alarm, and the balance of the deposit for the user has fallen below the reference amount. To call attention. The user depresses the switch to stop the operation of the buzzer when the alarm is confirmed.

Although the reference amount is set to one in this embodiment, a plurality of types of amounts, for example, 100,000 yen, 50,000 yen, and 10,000 yen are set, and when the reference amount is divided, the alarm device It is possible to give the user a preparation period for depositing money into the account by operating in different operation modes, for example, different colors and frequencies of alarm sounds. Also, in this example,
Although a liquid crystal element is used as the display element, it goes without saying that a display element such as a liquid crystal, a light emitting diode, or an electrochromic display that can display colors can be used. Furthermore, in this embodiment, the EEPROM is used as the semiconductor memory circuit, but the same effect can be obtained even if the RAM is backed up by a battery.

(Effect) As described above, according to the present invention, in the plate-shaped storage medium in which the terminal for connecting to an external device and transmitting and receiving data is provided on the surface of the substrate containing the semiconductor storage means, the data is read from the semiconductor storage means. By comparing the balance data with the preset reference amount data and issuing a sound alarm signal when the balance data is smaller than the reference amount data, the stored balance is below the reference amount. That
It can be known in advance as an acoustic signal without requiring a reading means.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus showing an embodiment of the present invention,
2 (a) and 2 (b) are perspective views showing the appearance of the device according to the present invention, and FIG. 3 is a diagram showing an example of the display state of the device. 11, 21 …… Alarm 11a, 21a …… Buzzer 11b …… Display element 21b …… Memory display element

Claims (1)

[Claims] 1. A plate-shaped storage medium having a terminal for transmitting and receiving data connected to an external device on a surface of a substrate having semiconductor storage means built-in, and balance data read from the semiconductor storage means and preset. A plate-shaped storage medium provided with means for comparing the generated reference amount data and issuing an acoustic alarm signal when the balance data is smaller than the reference amount data.