Patent ID: 6725388
Filing Date: 2004-04-20
Classification: G06F,H04L

Abstract:
A method comprising:inserting unique coded command signals into a data stream transmitted from a first asynchronous clock domain to a second asynchronous clock domain, wherein the unique coded command signals implement a link synchronization method; passing the unique coded command signals without change from the first asynchronous clock domain to the second asynchronous clock domain through an elastic buffer; decoding the unique coded command signals in receiver circuitry in the second asynchronous clock domain; controlling process circuitry that comprises a transmitter in the second asynchronous clock domain according to the decoded command signals; generating and outputting, by the receiver circuitry control signals that instruct the transmitter to transmit a sequence of IDLE characters, wherein at least one of the control signals is a sticky control signal that instructs the transmitter to transmit IDLE characters until there is a change in the state of the sticky control signal; and transmitting, with the transmitter, the sequence of IDLE characters to establish link synchronization.