JPS6437685A - Processor for potable medium - Google Patents

Processor for potable medium

Info

Publication number
JPS6437685A
JPS6437685A JP62193640A JP19364087A JPS6437685A JP S6437685 A JPS6437685 A JP S6437685A JP 62193640 A JP62193640 A JP 62193640A JP 19364087 A JP19364087 A JP 19364087A JP S6437685 A JPS6437685 A JP S6437685A
Authority
JP
Japan
Prior art keywords
power supply
card
voltage
reset signal
release
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
JP62193640A
Other languages
Japanese (ja)
Other versions
JP2637109B2 (en
Inventor
Hiroyuki Takamatsu
Mitsuru Nishioka
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.)
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
Original Assignee
Toshiba Corp
Toshiba Intelligent Technology 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 Toshiba Corp, Toshiba Intelligent Technology Co Ltd filed Critical Toshiba Corp
Priority to JP62193640A priority Critical patent/JP2637109B2/en
Publication of JPS6437685A publication Critical patent/JPS6437685A/en
Application granted granted Critical
Publication of JP2637109B2 publication Critical patent/JP2637109B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To surely protect information stored in a card from the reduction of a power supply for an IC card by monitoring the power supply of the card, and when the abnormality of the power supply is detected, inhibiting the release of a card reset signal. CONSTITUTION:It is supposed that the voltage of the card power supply 21 is dropped due to the short or the like of a transmission line for transmitting power to the card power supply 21. A power supply circuit 14 monitors the power supply voltage of the card power supply 21, and when the power supply voltage of the card power supply 21 is dropped lower than a previously set prescribed voltage is detected, the output side of the circuit 14, i.e. the transmission line of a card reset signal 22, is set to a lower level. Consequently, the release of the card reset signal 22 is inhibited. Thereby, the writing/reading operation of data information is stopped and the previously stored data contents are protected.
JP62193640A 1987-08-04 1987-08-04 Processing unit for portable media Expired - Fee Related JP2637109B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62193640A JP2637109B2 (en) 1987-08-04 1987-08-04 Processing unit for portable media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62193640A JP2637109B2 (en) 1987-08-04 1987-08-04 Processing unit for portable media

Publications (2)

Publication Number Publication Date
JPS6437685A true JPS6437685A (en) 1989-02-08
JP2637109B2 JP2637109B2 (en) 1997-08-06

Family

ID=16311303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62193640A Expired - Fee Related JP2637109B2 (en) 1987-08-04 1987-08-04 Processing unit for portable media

Country Status (1)

Country Link
JP (1) JP2637109B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6119835U (en) * 1984-07-09 1986-02-05 株式会社明電舎 Computer DC power supply monitoring device
JPS6244348U (en) * 1985-09-03 1987-03-17
JPS62105293A (en) * 1985-10-31 1987-05-15 Toshiba Corp Reading/writing device for portable recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6119835U (en) * 1984-07-09 1986-02-05 株式会社明電舎 Computer DC power supply monitoring device
JPS6244348U (en) * 1985-09-03 1987-03-17
JPS62105293A (en) * 1985-10-31 1987-05-15 Toshiba Corp Reading/writing device for portable recording medium

Also Published As

Publication number Publication date
JP2637109B2 (en) 1997-08-06

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees