Title:
CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2016192009
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make it possible to detect a failure in an EEPROM from a specific range to the entire area without using a complicated algorithm while ensuring failure detection accuracy.SOLUTION: A control device groups control data of a Backup RAM to be stored in an EEPROM, calculates a SUM value of the control data during writing in the EEPROM for each of the groups, and holds the value as Backup RAM and writes to store in the EEPROM. At the subsequent energization after a power supply cutoff period, the control device calculates the SUM value of a control data value read out from the EEPROM for each of the groups, when the SUM value stored in the EEPROM matches with the value of the SUM value held as Backup RAM, determines that the value of Backup RAM is correct, and compares the SUM value held as Backup RAM with the SUM value calculated from the control data value read out from the EEPROM to determine whether the EEPROM is in failure (NG) or a normal state (OK).SELECTED DRAWING: Figure 1
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Inventors:
TAKITA AKIYOSHI
HASHIMOTO KENJI
TATE SEIJI
MASUKO DAICHI
TAMURA KUNIHIRO
MAYAMA KEIICHI
HASHIMOTO KENJI
TATE SEIJI
MASUKO DAICHI
TAMURA KUNIHIRO
MAYAMA KEIICHI
Application Number:
JP2015070624A
Publication Date:
November 10, 2016
Filing Date:
March 31, 2015
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
G06F12/16
Domestic Patent References:
| JP2000035922A | 2000-02-02 | |||
| JP2008296757A | 2008-12-11 | |||
| JP2009099026A | 2009-05-07 | |||
| JP2000035923A | 2000-02-02 | |||
| JP2006318132A | 2006-11-24 | |||
| JP2000066963A | 2000-03-03 |
Attorney, Agent or Firm:
Manabu Inoue
Yuji Toda
Shigemi Iwasaki
Yuji Toda
Shigemi Iwasaki
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