Timestamp Interface - 2.3 English

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

Document ID
PG314
Release Date
2024-05-30
Version
2.3 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.