Supervisory circuit for a programmed processing unit

Details Supervisory circuit for a programmed processing unit Supervisory circuit for a programmed processing unit

1985-04-19

1987-06-16

Williams, Archie E.

Boots, shoes, and leggings

307350, 371 62, G06F 1128, H03K 5159

Patent

active

046740350

ABSTRACT:
A supervisory circuit for use in an integrated circuit to supervise the program execution of a processing unit is disclosed. The processing unit generates a restart signal at a particular duty cycle under proper program execution conditions and at an undesirable duty cycle under improper program execution conditions. The supervising circuit includes a capacitive or like circuit element for converting the restart signal into a signal representative of the duty cycle thereof and compares the generated signal to a reference window comprising upper and lower reference values. Should the generated signal exceed the boundaries of the window reference, a corresponding control signal is generated to change the circuit conditions and generate a reset signal to the processing unit to govern the program execution thereof to a prespecified point from which point program execution may continue upon removal of the reset signal.

REFERENCES:
patent: 4055777 (1977-10-01), Black
patent: 4363092 (1982-12-01), Abo et al.
patent: 4410991 (1983-10-01), Lenart
patent: 4434403 (1984-02-01), Chang
patent: 4541050 (1985-09-01), Honda et al.
patent: 4586179 (1986-04-01), Sirazi et al.

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