Apparatus and method to interface two different clock domains

Details Apparatus and method to interface two different clock domains Apparatus and method to interface two different clock domains

2007-11-13

2007-11-13

Suryawanshi, Suresh K (Department: 2115)

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

C713S600000, C710S052000

Reexamination Certificate

active

10822534

ABSTRACT:
A gearbox is placed between two clock domains to allow data to be transferred from one domain to the other. Although the two domains may operate at the same clock frequency, typically one domain has a faster clock speed than the other. The gearbox is disposed between the two clock domains to control timing of data transfer from one to the other, by selecting a pattern which identifies when data is made transparent for the transfer. The gearbox allows a number of clock ratios to be selected, so that a particular clock ratio between the two domains may be readily selected in the gearbox for the data transfer.

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