Asynchronous state machine

Details Asynchronous state machine Asynchronous state machine

1985-05-06

1988-04-26

Shaw, Gareth D.

Boots, shoes, and leggings

328 75, 3408255, 364140, 364141, 364143, 370 91, G06F 900

Patent

active

047408910

ABSTRACT:
An asychronous state machine waits a variable length of time after first detecting a change in input state before initiating a machine state change, the new machine state being a function of the previous machine state and the input state at the end of the waiting time, thereby allowing multiple, non-simultaneous input changes to occur during said waiting time without initiating intermediate state changes. The waiting time is a function of the current state of the machine. One state variable of a set characterizing the current state of the machine indicates whether the current state is an interim state in a sequence of states occurring after an input state change. Following a machine state change, this sequencing state variable initiates a subsequent state change, in the absence of any further input state changes, when the sequencing state variable associated with the current machine state indicates that the current machine state is such an interim state of a sequence of states.

REFERENCES:
patent: 4167789 (1979-09-01), Faustini
patent: 4390969 (1983-06-01), Hayes
patent: 4562427 (1985-12-01), Ecton
patent: 4633489 (1986-12-01), Morishita
patent: 4663545 (1987-05-01), Pumo et al.

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