Visible to Intel only — GUID: xtl1644983211773
Ixiasoft
Visible to Intel only — GUID: xtl1644983211773
Ixiasoft
55.6. Clocking
CSR register is driven by the CSR clock domain. The ACE-LITE and AXI-4 signals are driven by AXI clock domain. GPIO interface is a 32-bit asynchronous signal.
Clock crossing from the CSR Register/GPIO signals to the AXI clock domain is done by the data_synchronizer submodule. The data synchronizer module will output the synchronized data only if it stays unchanged for the given QUALIFYING TIME (currently set to 3 clock cycles).