Visible to Intel only — GUID: nik1409872167910
Ixiasoft
Visible to Intel only — GUID: nik1409872167910
Ixiasoft
1.2.1.1.2. Registered Mode
To eliminate the FIFO latency uncertainty for applications with stringent datapath latency uncertainty requirements, bypass the FIFO functionality in registered mode to incur only one clock cycle of datapath latency when interfacing the transmitter channel to the FPGA fabric. Configure the FIFO to registered mode when interfacing the transmitter channel to the PCIe hard IP block to reduce datapath latency. In registered mode, the low-speed parallel clock that is used in the transmitter PCS clocks the FIFO.