Flag setting circuit for microcontroller

Details Flag setting circuit for microcontroller Flag setting circuit for microcontroller

1995-12-04

1998-04-07

Elmore, Reba I.

Boots, shoes, and leggings

364134, 364136, G05B 19048

Patent

active

057372128

ABSTRACT:
A flag setting circuit for a microcontroller, which can be set with a HALT mode flag and a watchdog timer overflow flag by using a system power-on signal, an external reset signal, a watchdog timer overflow signal inside the microcontroller, a clear instruction for watchdog timer, a HALT mode instruction, and a wake-up signal. The setting circuit for the watchdog timer overflow flag includes a reset signal generator, a watchdog timer, a clear signal generator, a flag clear circuit, and a register circuit. The setting circuit for the HALT mode flag includes a HALT mode discerning circuit, a flag clear circuit, and a register circuit. The frequency source of the watchdog timer is provided by means of a frequency from the system oscillator divided with four, or by using a frequency of RC oscillator built in the system. Under the HALT mode, the RC oscillator is selected. By means of the HALT mode flag and the watchdog timer overflow flag, the operation condition of the system hardware can be discerned.

REFERENCES:
patent: 4802089 (1989-01-01), Shaw
patent: 4809280 (1989-02-01), Shonaka
patent: 4847616 (1989-07-01), Gotou et al.
patent: 5031212 (1991-07-01), Saiji et al.
patent: 5315184 (1994-05-01), Benhamida
patent: 5341497 (1994-08-01), Younger
patent: 5446864 (1995-08-01), Burghardt et al.
patent: 5454114 (1995-09-01), Yach et al.
patent: 5455937 (1995-10-01), Berman et al.
patent: 5504903 (1996-04-01), Chen et al.
patent: 5541943 (1996-07-01), Niescier et al.

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