| 摘要 |
<p>PURPOSE:To attain the indpendent execution of initialization between a memory system and a microprocessor by applying two types of service interruption detecting signals to a power supply device. CONSTITUTION:In the case of a long service interruption time t1-t5, a microprocessor 2 is initialized when a power supply state indicating signal (e) is turned off at a time point t2. When the signal (b) is turned on at a time point t5, an output signal (f) is also turned off at a time point t4. Thus the initialization is needed for a memory 1. Then a signal (e) is turned off when the signal (b) is turned on at the time t5 and therefore a microprogram starts its operation immediately after the t5. then the memory 1 is initialized via a signal (a). While in the case of a short service interruption time t6-t7, the signal (f) is kept ON together with the signal (e) kept ON. Thus an output signal (c) is turned on at a time point t7, and the memory 1 is not initialized even if the signal (b) is turned on.</p> |
