Interface circuit, system and method for interfacing an electron

Details Interface circuit, system and method for interfacing an electron Interface circuit, system and method for interfacing an electron

1995-06-29

1996-09-10

Westin, Edward P.

Electronic digital logic circuitry

Clocking or synchronizing of logic stages or gates

375356, 327145, 327155, H03K 1900

Patent

active

055552137

ABSTRACT:
An interface circuit (100) for interfacing an electronic device, such as a microprocessor (102), operating at a device clock speed and a finite synchronous state machine (104) comprised of a D-type flip-flop (106) and a synchronous state machine (108), which are operating at a state clock speed, is provided. The device clock speed being capable of being greater than the state clock speed. The interface circuit.degree. (100) comprises an input circuit, which may comprise a first NAND gate (120), connected to a latch circuit which may comprise interconnected second and third NAND gates (124) and (126). The input circuit and latch circuit store an input signal (121) received from the electronic device and transmit the input signal (121) to the flip-flop (106) when the synchronous state machine (108) is ready to accept further input signals. A system for operating the finite synchronous state machine (104) associated with a state clock speed and a method for interfacing an electronic device operating at a device clock speed and a synchronous state machine (108) operating at a state clock speed are also provided.

REFERENCES:
patent: 4289976 (1981-09-01), Maly
patent: 5047658 (1991-09-01), Shrock et al.
patent: 5070443 (1991-12-01), Priem et al.
patent: 5079696 (1992-01-01), Priem et al.
patent: 5155393 (1992-10-01), Gongwer et al.
patent: 5450458 (1995-09-01), Price et al.

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