JPS643898A - Data writing system for eeprom - Google Patents

Data writing system for eeprom

Info

Publication number
JPS643898A
JPS643898A JP15652187A JP15652187A JPS643898A JP S643898 A JPS643898 A JP S643898A JP 15652187 A JP15652187 A JP 15652187A JP 15652187 A JP15652187 A JP 15652187A JP S643898 A JPS643898 A JP S643898A
Authority
JP
Japan
Prior art keywords
area
circuit
writing
value
guaranteed
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.)
Pending
Application number
JP15652187A
Other languages
Japanese (ja)
Inventor
Yoshiaki Kobayashi
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
Original Assignee
Toshiba Corp
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 filed Critical Toshiba Corp
Priority to JP15652187A priority Critical patent/JPS643898A/en
Publication of JPS643898A publication Critical patent/JPS643898A/en
Pending legal-status Critical Current

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  • Read Only Memory (AREA)

Abstract

PURPOSE:To secure the completeness of write data by providing write areas at plural positions and regarding another area as an write object area when the number of times of writing of one area exceeds a guaranteed value. CONSTITUTION:When write data 100 is inputted to a decision circuit 1, the circuit 1 actuates a read circuit 4 to read data and the counted value of the number of times of writing out of an area (a) of an electrically erasable P-ROM 3. Then the address of the area (a) and the counted value are outputted to a writing circuit 2 and written in the area (a) unless the counted value exceeds the specific guaranteed value of the number of times of erasure and writing. When, however, the value exceeds the guaranteed value, the circuit 1 reads data out of a stand-by area (b) through the circuit 4 and similar processing is carried out. Then when the numbers of times of erasure and writing of all stand-by areas exceed the guaranteed value, a LED lights. Thus, the completeness of write data is guaranteed.
JP15652187A 1987-06-25 1987-06-25 Data writing system for eeprom Pending JPS643898A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15652187A JPS643898A (en) 1987-06-25 1987-06-25 Data writing system for eeprom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15652187A JPS643898A (en) 1987-06-25 1987-06-25 Data writing system for eeprom

Publications (1)

Publication Number Publication Date
JPS643898A true JPS643898A (en) 1989-01-09

Family

ID=15629604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15652187A Pending JPS643898A (en) 1987-06-25 1987-06-25 Data writing system for eeprom

Country Status (1)

Country Link
JP (1) JPS643898A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907142A2 (en) * 1992-04-02 1999-04-07 Kabushiki Kaisha Toshiba Memory card apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907142A2 (en) * 1992-04-02 1999-04-07 Kabushiki Kaisha Toshiba Memory card apparatus
EP0907142A3 (en) * 1992-04-02 2000-12-06 Kabushiki Kaisha Toshiba Memory card apparatus

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