1G/2.5G/5G/10G Multirate Ethernet PHY Intel® FPGA IP User Guide: Agilex™ 5 FPGAs and SoCs

ID 813667
Date 7/08/2024
Public
Document Table of Contents

5.2. Reset Signals

Table 16.   Reset Signals
Signal Name Direction Width Description PHY Configurations
reset Input 1 Active-high global reset. Assert this signal to trigger an asynchronous global reset. All
tx_digitalreset Input 1 Active-high signal. When asserted, triggers an asynchronous reset to the digital logic on the TX path and HSSI.
rx_digitalreset Input 1 Active-high signal. When asserted, triggers an asynchronous reset to the digital logic on the RX path and HSSI.
i_rst_n Input 1

Active-low asynchronous reset signal. Do not deassert until o_rst_ack_n deasserts.

  • Resets the TX interface, including the TX PCS.
  • Resets the RX interface, including the RX PCS.
  • Resets the TX PMA and TX PLDIF.
  • Resets the RX PMA and RX PLDIF.

This reset leads to assertion of the o_rst_ack_n output signal.

o_rst_ack_n Output 1 Active-low asynchronous acknowledgment signal for the i_rst_n reset.

Do not deassert the i_rst_n reset until the o_rst_ack_n asserts.

i_tx_rst_n Input 1 Active-low asynchronous reset signal.

Resets the entire TX datapath, including the TX PCS, TX PMA, and TX PLDIF. Do not deassert until the o_rst_ack_n asserts.

Note: In MGBASE-T mode, this reset impacts both TX and RX, as the TX clock is used in both direction.
o_tx_rst_ack_n Output 1 Active-low asynchronous acknowledgment signal for the i_tx_rst_n reset.

Do not deassert the i_tx_rst_n reset until o_tx_rst_ack_n asserts.

i_rx_rst_n Input 1 Active-low asynchronous reset signal.

Resets the entire RX datapath, including the RX PCS, RX PMA, and RX PLDIF. Do not deassert until o_rst_ack_n asserts.

o_rx_rst_ack_n Output 1 Active-low asynchronous acknowledgment signal for the i_rx_rst_n reset.

Do not deassert the i_rx_rst_n reset until o_rx_rst_ack_n asserts.

gmii8b_tx_rst_n Input 1 Reset signal for the GMII8B adapter on the TX path.
gmii8b_rx_rst_n Input 1 Reset signal for the GMII8B adapter on the RX path.