Method of rewriting flash EEPROM and electronic control...

Details Method of rewriting flash EEPROM and electronic control... Method of rewriting flash EEPROM and electronic control...

2008-04-15

2008-04-15

Lane, Jack (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C712S229000, C717S168000

Reexamination Certificate

active

11366461

ABSTRACT:
A method of rewriting a flash EEPROM of an electronic control device for controlling a vehicle equipment via a microcomputer is proposed. The flash EEPROM stores a control program and a flash EEPROM rewriting program. The operation of the vehicle equipment is changed by changing the control program via a microcomputer. When receiving a control-program-rewriting command signal, data on an internal condition and state of connection of the microcomputer are memorized. Then, the control program is changed to the flash EEPROM rewriting program, so that the data are read according to the flash EEPROM rewriting program to control the microcomputer to operate in the same internal condition and state of connection thereof as before. Thereafter, the microcomputer rewrites the flash EEPROM with a new control program sent from outside. Therefore, the vehicle equipment can be continuously operated by a user during the rewriting mode.

REFERENCES:
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patent: 2003/0167371 (2003-09-01), Katahira
patent: 2004/0268023 (2004-12-01), Hori
patent: 2005/0010914 (2005-01-01), Liang et al.
patent: 11-175331 (1999-07-01), None
patent: 2001-265601 (2001-09-01), None
patent: 2003-303132 (2003-10-01), None

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