COMPUTER CONTROL DEVICE

PURPOSE:To prevent a miswrite to a standby RAM by providing a resetting means to be operated in a condition in which a system power voltage is lowered further than a specified voltage value or in which a period watch dock clear signal specified with a watch dock means is not generated. CONSTITUTION:...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SUGIURA KENGO, SANADA KAZUYA
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING COUNTING ELECTRIC DIGITAL DATA PROCESSING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent a miswrite to a standby RAM by providing a resetting means to be operated in a condition in which a system power voltage is lowered further than a specified voltage value or in which a period watch dock clear signal specified with a watch dock means is not generated. CONSTITUTION:By a detecting means 19 of the system power voltage, a write inhibiting command is given to a standby RAM 141 in the condition in which the power voltage is lowered below a set voltage. Simultaneously, a write permission is given to the standby RAM 141 in the condition in which the system power source is returned and, simultaneously, the watch dock clear signal is generated by a watch dock means 17. Thus, the miswrite to the standby RAM 141 due to, for example, the reckless operation of a CPU 11 can be surely prevented.