Microcomputer

Details Microcomputer Microcomputer

1994-07-21

1996-01-09

Mai, Tan V.

Boots, shoes, and leggings

36523006, G06J 100

Patent

active

054834716

ABSTRACT:
A microcomputer in which a monitor Read Only Memory (ROM) 100 having a monitor sense amplifier circuit 113 whose normal operation range for power voltage is set narrower than that of the sense amplifier circuit 130 of the ROM 20 is provided, and the sense amplifier circuit 130 of the ROM 20 is constructed so as to has a plurality of sense amplifier circuit portions and a switching circuit portion to obtain an optimum operation range for a plurality of power voltages by switching the circuit characteristic according to a signal supplied from the monitor ROM 100. The sense amplifier circuit 130 is switched to obtain an optimum operation range for a plurality of power voltages, or the frequency of the system clock E can be switched, by detecting such a state wherein the power voltage decreases or the frequency of the system clock E increases to reach near the operation limit.

REFERENCES:
patent: 5276842 (1994-01-01), Sugita

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