Ethernet Subsystem Intel® FPGA IP User Guide

ID 773413
Date 9/16/2024
Public
Document Table of Contents

5.4. Resets

Table 47.  Reset Signals
Signal Name Direction Type Description
subsystem_cold_rst_n In Reset

Asynchronous, active-low hard global reset.

Resets the TX MAC, RX MAC, TX PCS, RX PCS, transceivers (transceiver reconfiguration registers and interface), and Ethernet reconfiguration registers.

This reset leads to the de-assertion of the o_tx_lanes_stableand o_rx_pcs_ready output signals.

i_p<n>_tx_rst_n In Reset

Asynchronous, active-low hard reset.

Resets the TX interface, including the TX PCS and TX MAC. This reset leads to the de-assertion of the o_tx_lanes_stable output signal.

i_p<n>_rx_rst_n In Reset

Asynchronous, active-low hard reset.

Resets the RX interface, including the RX PCS and RX MAC. This reset leads to the de-assertion of the o_rx_pcs_ready output signal.

o_p<n>_tx_rst_ack_n Out Reset Acknowledge

Activelow acknowledge signal for i_tx_rst_n.

The user should not de-assert i_tx_rst_n until o_tx_rst_ack_n is asserted.

o_p<n>_rx_rst_ack_n Out Reset Acknowledge

Activelow acknowledge signal for i_rx_rst_n.

The user should not de-assert i_rx_rst_n until o_rx_rst_ack_n is asserted.

subsystem_cold_rst_ack_n Out Reset Acknowledge

Activelow acknowledge signal for subsystem_cold_rst_n.

The user should not de-assert subsystem_cold_rst_n until subsystem_cold_rst_ack_nis asserted.

Table 48.  Reset Signals- Block Level
Reset Signal Ethernet Subsystem IP Block
subsystem_cold_rst_n
  • Tile Adaptor TX Logix
  • Tile Adaptor RX Logic
  • Subsystem CSRs
  • Address Decoder
  • AXI-ST Bridge TX Logic/PTP TX
  • AXI-ST Bridge RX Logic/PFC RX Logic
  • AXI-Lite Bridge
  • QHIP
  • NIOS
  • JTAG
  • AN/LT (F-Tile Only)
app_ss_st_txphydirect_areset_n

AXI-ST Bridge TX Logic/PTP TX

app_ss_st_rxphydirect_areset_n

AXI-ST Bridge RX Logic/PFC RX Logic

app_ss_lite_areset_n

AXI-Lite Bridge

i_tx_rst
  • Tile Adaptor TX Logic
  • AXI-ST Bridge TX Logic/ PTP TX
i_rx_rst
  • Tile Adaptor RX Logic
  • AXI-ST Bridge RX Logic/ PFC RX Logic