CDC Handshake Synchronizer

1. Request: when a new request arrives on the source side, data is latched and a request flag is raised. The module goes busy.

2. Request synchronization: the flag is synchronized into the destination domain via double flip-flop.

3. Acknowledgment: the destination domain signals reception. The ack is synchronized back to the source domain.

4. Release: upon receiving the ack, the request flag is lowered and the module becomes available.

Resets are synchronous in each respective domain.

• Resets are synchronous in each respective domain
• Data is latched on the source side throughout the transfer
• Double flip-flop for each clock domain crossing