Burst data clock domain crossing

How to handle clock domain crossing for streaming burst data

This is a medium-difficulty digital design question that tests your understanding of synchronisation primitives and how to preserve data integrity when moving high-throughput streams across asynchronous clock domains. It's the kind of problem you encounter in FPGA and ASIC design interviews, particularly at firms building low-latency hardware or data-acquisition systems.

The question probes whether you can reason about metastability, handshaking protocols, and the trade-offs between throughput, latency, and design complexity. A strong answer identifies the right synchronisation mechanism for burst traffic, acknowledges the constraints imposed by the target clock domain, and explains why simpler approaches (like direct register chains) are insufficient for continuous, high-bandwidth data movement.

• Metastability and synchronisation primitives (grey-code counters, handshake signals)
• Dual-clock FIFO design and CDC (clock domain crossing) safety
• Ready/valid flow control and backpressure across domains
• Trade-offs between synchronisation latency and throughput