Two-MCU system and hang-up detecting method of MCU

Details Two-MCU system and hang-up detecting method of MCU Two-MCU system and hang-up detecting method of MCU

2006-07-04

2006-07-04

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S023000, C714S025000, C714S055000

Reexamination Certificate

active

07073097

ABSTRACT:
A two-MCU system includes a main-MCU and a sub-MCU. When any one of operating keys is operated, an operation signal is applied to the sub-MCU. Thereupon, the sub-MCU detects the operation of the operating key, and makes a timer start to count a time period. The sub-MCU, when no specified command is received from the main-MCU irrespective of a lapse of a predetermined time period, determines that the main-MCU is being in a hang-up state. Then, the sub-MCU applies a reset signal to a reset circuit thereby to reset the main-MCU, and the two-MCU system returns from the hang-up.

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