Reliability clock domain crossing

Details Reliability clock domain crossing Reliability clock domain crossing

2007-05-29

2007-05-29

Hoang, Huan (Department: 2827)

Static information storage and retrieval

Addressing

Sync/clocking

C365S230030, C365S236000

Reexamination Certificate

active

11304166

ABSTRACT:
A data communications system is disclosed. The data communications system comprises two clock domains. A first clock domain includes a transmitter and a first clock signal. A second clock domain includes a receiver and a second clock signal. The transmitter conveys the first clock signal and a data signal to the receiver. The receiver: (a) counts a first number of transitions of the second clock signal in response to detecting a transition of the first clock signal; (b) maintains a first count of the number of transitions of the second clock signal; (c) samples the data signal and maintains a second count of the number of transitions of the second clock signal in response to detecting the first count equals a first pre-determined value; and (d) samples the data signal and resets the second count in response to detecting the second count equals a second pre-determined value.

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