F-Tile JESD204B Intel® FPGA IP User Guide

ID 723907
Date 4/23/2024
Public
Document Table of Contents

4.5. Reset Scheme

All resets in the F-Tile JESD204B IP are synchronous reset signals and should be asserted and deasserted synchronously.
Note: Ensure that the resets are synchronized to the respective clocks for reset assertion and deassertion.
Table 16.   F-Tile JESD204B IP Resets
Reset Signal Associated Clock Description

jesd204_tx_avs_rst_n

jesd204_rx_avs_rst_n

jesd204_tx_avs_clk

jesd204_rx_avs_clk

This reset is associated with the jesd204_tx_avs_clk signal. This reset is an active low signal. You can assert this reset signal asynchronously but must deassert it synchronously to the jesd204_tx_avs_clk signal. After you deassert this signal, the CPU can configure the CSRs.

This reset is associated with the jesd204_rx_avs_clk signal. This reset is an active low signal. You can assert this reset signal asynchronously but must deassert it synchronously to the jesd204_rx_avs_clk signal. After you deassert this signal, the CPU can configure the CSRs.

jesd204_tx_rst_n

jesd204_rx_rst_n

Asynchronous

From User. Async Assertion and Deassertion.

Assertion triggers reset sequence to MAC and PHY(Tile). Reset sequence completion indicated by assertion tx_rst_ack_n.

Deassertion triggers out-of-reset sequence. Out of reset completion indicates by deassertion of tx_rst_ack_n.

User is required to assert this reset if tx_avs_rst_n is asserted.

Assertion triggers reset sequence to MAC and PHY(Tile). Reset sequence completion indicated by assertion rx_rst_ack_n.

Deassertion triggers out-of-reset sequence. Out of reset completion indicates by deassertion of rx_rst_ack_n.

User is required to assert this reset if rx_avs_rst_n is asserted.

jesd204_tx_rst_ack_n

jesd204_rx_rst_ack_n

Asynchronous

To User to indicate the Tile fully in reset. Async Assertion and Deassertion.

(IP uses avs_clk or reconfig_xcvr_clk internally)

jesd204_tx_out_of_reset

jesd204_rx_out_of_reset

Asynchronous

To indicate the reset status of the SIP link layer. Async Assertion and Deassertion.

(IP uses avs_clk or reconfig_xcvr_clk internally)

User may optionally observe jesd204_tx_out_of_reset = 1 to indicate SIP out of reset to pulse SYSREF for subclass 1. User must synchronize this signal before use.

User may optionally observe jesd204_rx_out_of_reset = 1 to indicate SIP out of reset to pulse SYSREF for subclass 1. User must synchronize this signal before use.

0: SIP in reset

1: SIP out of reset

reconfig_xcvr_reset

jesd204_tx_avs_clk

jesd204_rx_avs_clk

From User: XCVR reconfiguration reset.

Active High. During duplex mode, both TX and RX share the same reconfig pins.

User is recommended to tie this to tx_avs_rst_n.