Static information storage and retrieval – Powering
Patent
1997-08-21
1999-03-30
Nelms, David
Static information storage and retrieval
Powering
365227, 365228, 36518901, 36518907, G11C 700
Patent
active
058897216
ABSTRACT:
A programmable memory device includes circuits that permit the selective disabling of certain functions when a battery supply voltage falls below the point necessary to sustain those functions while not disabling other functions of the device capable of working at the lower supply voltage. The programmable memory device includes a controller (422), programmable memory (426), and a voltage monitor (424), and is used in an application having additional circuitry (430). Power is furnished between the main voltage V.sub.CC terminal and the ground GND terminal from an external power source, typically a set of batteries. The voltage monitor enables full extension of the operational voltage range for specific functions of the programmable memory device, or for the application circuitry, or for both by reliably detecting the voltage level of the power source and providing an indication thereof. The indication of the present voltage level is used for suppressing functions that cannot be sustained at the present voltage level.
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Carroll David H.
Integrated Silicon Solution Inc.
Nelms David
Nguyen Tuan T.
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