Methods and circuitry for implementing first-in first-out...

Details Methods and circuitry for implementing first-in first-out... Methods and circuitry for implementing first-in first-out...

2007-01-23

2007-01-23

Chang, Daniel (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Sequential or with flip-flop

C326S037000, C365S154000, C365S221000

Reexamination Certificate

active

11027864

ABSTRACT:
Methods and circuitry for implementing high speed first-in first-out (FIFO) structures. In one embodiment, a FIFO is disclosed that allows the frequency of one clock, e.g., the write clock, to be different than (e.g., half) that of the other (read) clock. In another embodiment a FIFO is presented that can be set and/or reset asynchronously. Other embodiments are disclosed wherein the read and write pointers are effectively monitored to ensure proper timing relationship, to detect loss of clock as well as to detect other abnormal FIFO conditions.

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