Electronic control unit for a vehicle

Details Electronic control unit for a vehicle Electronic control unit for a vehicle

2006-02-21

2006-02-21

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

C701S115000, C701S114000

Reexamination Certificate

active

07003382

ABSTRACT:
In an electronic control unit for a vehicle, control data is stored in a volatile memory until a predetermined time passes after an ignition switch is turned off. This makes it possible to greatly reduce the frequency at which data is written into a nonvolatile memory. When the predetermined time has passed after the ignition switch is turned off, the control data stored in the volatile memory is written into the nonvolatile memory. Thereafter, the power supply from a power supply circuit to the volatile memory is stopped. Consequently, it is possible to store the control data reliably in either the volatile memory or the nonvolatile memory. It is also possible to reduce the dark current in the volatile memory.

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