Microprocessor auxiliary with ability to be queried re power his

Details Microprocessor auxiliary with ability to be queried re power his Microprocessor auxiliary with ability to be queried re power his

1988-12-09

1998-05-19

Shaw, Gareth D.

Boots, shoes, and leggings

371 66, 3649278, 364931, 3649314, 36493149, 364940, 364941, 3649411, 3649439, 3649448, 3649449, 3649484, 3649485, 3649487, G06F 1300

Patent

active

057544620

ABSTRACT:
A system which includes a microprocessor (or microcontroller) and an auxiliary chip which monitors the system power supply voltage and performs related functions for the microprocessor. The microprocessor can access the auxilary chip to ascertain the power history. That is, the microprocessor can direct an interrupt to the auxilary chip, which will cause the auxiliary chip to respond with a signal which indicates to the microprocessor whether the power supply voltage is heading up or down. When the microprocessor is reset at power-up, the present invention permits the microprocessor to determine (by querying the auxiliary chip) whether the supply voltage is marginal, so that the microprocessor does not go into full operation until the supply voltage is high enough.

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