| 摘要 |
<P>PROBLEM TO BE SOLVED: To repair data when writing failure occurs while suppressing an excessive increase in storage area. <P>SOLUTION: In response to a read request from a CPU, the last counter value CN (01111111) is read into RAM as a counter value RAMCN (Phase [1]). The counter value RAMCN is incremented (+3 operation) (Phase [2]). The incremented counter value RAMCN (10000010) is then written to a sub saving area of an EEPROM as a counter value CPCN (Phase [3]). The value of a predetermined bit position of the incremented counter value RAMCN is next written to an error checking bit ERR (Phase [4]). The incremented counter value RAMCN (10000010) is further written to a main saving area of the EEPROM as a counter value CN (Phase [5]). <P>COPYRIGHT: (C)2008,JPO&INPIT |
