Time-domain boundary bridge method and apparatus for asynchronou

Details Time-domain boundary bridge method and apparatus for asynchronou Time-domain boundary bridge method and apparatus for asynchronou

1992-09-16

1995-02-07

Harvey, Jack B.

Boots, shoes, and leggings

395550, 3642705, 3642709, 364DIG1, 327261, 326 93, G06F 1300

Patent

active

053882253

ABSTRACT:
A method and apparatus for a circuit physically realizing a time domain boundary buffer circuit for coupling an asynchronous sequential state machine controller to an asynchronous bus interface is described. A time domain boundary bridge latch circuit comprising a latch coupled to an asynchronous input, a delay element, and further coupled to a signal from the asynchronous sequential machine so that the signal from the asynchronous bus may be reliably captured is coupled to an input of the asynchronous sequential machine. The circuitry is designed to enable the asynchronous sequential machine to sample the asynchronous input as rapidly as possible without metastability errors. A second embodiment is disclosed for coupling an asynchronous sequential machine to a plurality of data bits on an asynchronous bus interface. Additional embodiments and applications are also disclosed.

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