F-tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 10/15/2021
Public

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3.4.3. Reset Signals

Table 40.  Reset Signals
Signal Name Clocks Domains Direction Description
tx_reset asynchronous input TX reset input for TX PMA and TX datapath. Must asserted until tx_reset_ack is asserted.
rx_reset asynchronous input RX reset input for RX PMA and RX datapath. Must be kept asserted until rx_reset_ack is asserted.
tx_reset_ack asynchronous output TX fully in reset indicator.
rx_reset_ack asynchronous output RX fully in reset indicator.
tx_am_gen_start asynchronous output When using FEC, indicates when to start sending alignment markers. This clears once tx_am_gen_2x_ack is asserted.
tx_am_gen_2x_ack asynchronous input When using FEC, indicates to the reset sequencer at least 2 alignment markers were sent since tx_am_gen_start is asserted. This signal is deasserted after tx_am_gen_start is deasserted.
tx_ready asynchronous output Status port to indicate when TX PMA and TX datapath are reset successfully and ready for data transfer.
rx_ready asynchronous output

If RX de-skew is disabled:

Status port to indicate when RX PMA and RX datapath are reset successfully and ready for data transfer.

If RX de-skew is enabled:

Status port to indicate when RX PMA and RX datapath are reset successfully, RX de-skew is done, and ready for data transfer.