Programmable microcomputer oscillator circuitry with synchronize

Details Programmable microcomputer oscillator circuitry with synchronize Programmable microcomputer oscillator circuitry with synchronize

1993-04-16

1996-04-23

Pan, Daniel

Boots, shoes, and leggings

3642399, 3642407, 3642703, 3642709, 3642714, 3642719, 364DIG1, 364DIG2, 395550, 327114, 327292, G06F 13372, G06F 1340, G06F 106, G06F 112

Patent

active

055112099

ABSTRACT:
A CMOS integrated circuit microcomputer is switchable under software control between high speed, high power operation and low speed, low power operation. The microcomputer includes asynchronous fast and slow clock oscillators. A synchronizing circuit coupled to the fast and slow clock oscillators receives a clock selection signal, and in response thereto produces a clock enable signal. The clock enable signal has the same frequency as and is synchronized with either the fast clock signal or the slow clock signal, depending on the state of the clock selection signal. The clock enable signal is input to gating circuitry that gates either the fast or the slow clock signal to provide a selectable speed clock signal to be used elsewhere in the microcomputer.

REFERENCES:
patent: 4137563 (1979-01-01), Tsunoda
patent: 4229699 (1980-10-01), Frissell
patent: 4365318 (1982-12-01), Aichelmann, Jr. et al.
patent: 4400817 (1983-08-01), Sumner
patent: 4480198 (1984-10-01), Gass
patent: 4652992 (1987-03-01), Mensch, Jr.
patent: 4670837 (1987-06-01), Sheets
patent: 4686386 (1987-08-01), Tadao
patent: 4849703 (1989-07-01), Easley et al.
patent: 4851987 (1989-07-01), Day
patent: 4851995 (1989-07-01), Hsu et al.
patent: 4855615 (1989-08-01), Humpleman

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