Power on reset circuit for a microcontroller

Details Power on reset circuit for a microcontroller Power on reset circuit for a microcontroller

2005-03-15

2005-03-15

Perveen, Rehana (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

C713S340000, C327S143000, C327S198000, C323S266000, C365S189090, C365S226000

Reexamination Certificate

active

06868500

ABSTRACT:
In accordance with one embodiment of the present invention, a circuit provides power stability functions for a microcontroller, during startup and normal operations performing power on reset functions and an array of power stability functions. The power on reset functions hold the microcontroller in a safe reset condition, reinforce the POR hold, and force its switch mode pump to drive up voltage provided to its common supply source. The power stability functions constitute a power on reset function, a power supply health, e.g., power state condition monitoring function, a control function for dynamically controlling the common supply source, and auxiliary functions, which may be protective of a flash memory. The power on reset function operates at a fixed and/or programmably changeable voltage levels. In one embodiment, the POR circuit is interconnected with a processor through a bus, enabling programmatic processor control of microcontroller power through interaction with the POR circuitry.

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IBM TDB, vol. 36, Issue 8, “Electronic Circuit Protector-Circuit Breaker”, pp. 179-180, Aug. 1, 1993.*
“A Power Supply Pump Circuit for a Microcontroller”; Aug. 30, 2001; U.S. Appl. No. 09/922,419; Kutz et al.
“Novel Method and System for Interaction Between a Processor and a Power on Reset Circuit to Dynamically Control Power States in a Microcontroller”; Jun. 22, 2001; U.S. Appl. No. 09/887,923; Kutz et al.

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