AXI4-Stream Interface – 128-bit Straddle Packet Interface - AXI4-Stream Interface – 128-bit Straddle Packet Interface - 4.0 English

AXI4-Stream Interface – 128-bit Straddle Packet Interface - AXI4-Stream Interface – 128-bit Straddle Packet Interface - 4.0 English - PG211

40G/50G High Speed Ethernet Subsystem Product Guide (PG211)

Document_ID

PG211

Release_Date

2025-12-09

Version

4.0 English

In the AXI4-Stream interface, the following tables describe the clock/reset signals, the Receive interface signals, and the Transmit interface signals.

Table 1. AXI4-Stream Interface – Clock/Reset Signals
Name	I/O	Description
dclk	I	This must be a convenient stable clock, for example 75 MHz. Refer to the current transceiver guide for up to date information.
rx_reset	I	Reset for the RX circuits. This signal is active-High (1 = reset) and must be held High until clk is stable. The 40G/50G High Speed Ethernet Subsystem handles synchronizing the rx_reset input to the appropriate clock domains within the core. This is a synchronous reset.
refclk_n0	I	Differential reference clock for the transceiver (N).
refclk_p0	I	Differential reference clock for the transceiver (P).
tx_reset	I	Reset for the TX circuits. This signal is active-High (1 = reset) and must be held High until clk is stable. The 40G/50G High Speed Ethernet Subsystem handles synchronizing the tx_reset input to the appropriate clock domains within the core. This is a synchronous reset.