| 摘要 |
<p>PURPOSE:To apply a general-purpose microprocessor chip even to a processor of a switchboard, etc., that requires the high reliability processor by attaining the initialization to each operation mode of the processor with a simple means. CONSTITUTION:The factor of initialization is set to a reset status register RSR with an initialization request and a microprocessor muP is started. The mode definition date stored in a ROM is set to 8 relevant register group RSG. Then the muP reads the RSR and analyzes the factor of initialization. In regard of the general initialization, e.g. a resetting operation performed through an external switch, the normal initialization processing is carried out. In regard of the initialization proper to an operating mode, i.e., a reset state caused by a trouble, the trouble recovering method is decided based on the date on the operation mode. Then, an initialization routine is selected and carried out in response to each operation mode. The muP clears the RSR at the end of an initial routine and runs or halts a central processor unit CPU in response to the operation mode. Finally the muP halts itself.</p> |
