JPS6470892A - Ic card reader/writer - Google Patents

Ic card reader/writer

Info

Publication number
JPS6470892A
JPS6470892A JP62226438A JP22643887A JPS6470892A JP S6470892 A JPS6470892 A JP S6470892A JP 62226438 A JP62226438 A JP 62226438A JP 22643887 A JP22643887 A JP 22643887A JP S6470892 A JPS6470892 A JP S6470892A
Authority
JP
Japan
Prior art keywords
voltage
data
card
power supply
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62226438A
Other languages
Japanese (ja)
Other versions
JP2593885B2 (en
Inventor
Shuichi Matsumura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP62226438A priority Critical patent/JP2593885B2/en
Publication of JPS6470892A publication Critical patent/JPS6470892A/en
Application granted granted Critical
Publication of JP2593885B2 publication Critical patent/JP2593885B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To make the titled device convenient for portable use, to prevent the generation of a fault at the time of generating abnormality, to protect the data of an IC card from being broken, and to make it possible to use the device also for an IC card including an EPROM by using a battery for the power supply of the device and providing various monitoring circuits, comparators or the like. CONSTITUTION:The voltage of a battery 1 used as the power supply of the device is boosted by a boosting circuit 3 and impressed to an IC card power supply voltage terminal 19 through a regulator 7 or the like. On the other hand, a voltage boosted by a boosting circuit 2 is impressed to an IC card data writing voltage impressing terminal 18 through a data writing voltage switching circuit 4 to drive the IC card. Data transmitted/received through a data reading/writing terminal 21 are transferred through external device through a data transfer means (a signal interinterruption circuit 14, a microprocessor 15, etc.), and when the voltage drop of a power supply voltage or a data writing voltage is detected by voltage monitoring circuits 10, 11 or an excess current is detected by comparators 8, 9, 13, all terminals other than a ground terminal are disconnected. Consequently, the device can be made convenient for portable use and data can be prevented from being broken at the time of generating abnormality.
JP62226438A 1987-09-11 1987-09-11 IC card reader / writer Expired - Lifetime JP2593885B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62226438A JP2593885B2 (en) 1987-09-11 1987-09-11 IC card reader / writer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62226438A JP2593885B2 (en) 1987-09-11 1987-09-11 IC card reader / writer

Publications (2)

Publication Number Publication Date
JPS6470892A true JPS6470892A (en) 1989-03-16
JP2593885B2 JP2593885B2 (en) 1997-03-26

Family

ID=16845113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62226438A Expired - Lifetime JP2593885B2 (en) 1987-09-11 1987-09-11 IC card reader / writer

Country Status (1)

Country Link
JP (1) JP2593885B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008276435A (en) * 2007-04-27 2008-11-13 Dainippon Printing Co Ltd IC card with display function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008276435A (en) * 2007-04-27 2008-11-13 Dainippon Printing Co Ltd IC card with display function

Also Published As

Publication number Publication date
JP2593885B2 (en) 1997-03-26

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