Timestamp Interface - 1.3 English

Versal Devices Integrated 100G Multirate Ethernet MAC Subsystem Product Guide (PG314)

Document ID
Release Date
1.3 English

This section describes the ports relating to the operation of the IEEE 1588 Timestamping function. The timestamping interface can be coupled with either the Flex I/F or the AXI4-Stream interface, depending on which interface is active.

When the AXI4-Stream interface is active, the timestamping signals are clocked by the AXI clock. When the Flex I/F is active and the AXI4-Stream interface is disabled, the timestamp interface still uses the AXI clock. For this reason, the flexif_clk should drive the axi_clk port when the Flex I/F is in use.