L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 7/20/2022
Public
Document Table of Contents

4.6.1. User-Coded Reset Controller Signals

Refer to the signals in the following figure and table for implementation of a user-coded reset controller.
Figure 181. User-Coded Reset Controller, Transceiver PHY, and TX PLL Interaction
Table 148.  User-coded Reset Controller, Transceiver PHY, and TX PLL Signals

Signal Name

Direction

Description

tx_analogreset

Output

Resets the TX PMA when asserted high.

tx_digitalreset

Output

Resets the TX PCS when asserted high.

rx_analogreset

Output

Resets the RX PMA when asserted high.

rx_digitalreset

Output

Resets the RX PCS when asserted high.

clock

Input

Clock signal for the user-coded reset controller. You can use the system clock without synchronizing it to the PHY parallel clock. The upper limit on the input clock frequency is the frequency achieved in timing closure.

pll_cal_busy

Input

A high on this signal indicates the PLL is being calibrated.

pll_locked

Input

A high on this signal indicates that the TX PLL is locked to the ref clock.

tx_cal_busy

Input

A high on this signal indicates that TX calibration is active. If you have multiple PLLs, you can OR their pll_cal_busy signals together.

rx_is_lockedtodata

Input

A high on this signal indicates that the RX CDR is in the lock-to-data (LTD) mode.

rx_cal_busy

Input

A high on this signal indicates that RX calibration is active.

tx_analogreset_stat

Input

A high on this signal indicates that reset sequence for TX PMA has begun.

A low on this signal indicates that reset sequence for TX PMA has finished.

rx_analogreset_stat Input

A high on this signal indicates that reset sequence for RX PMA has begun.

A low on this signal indicates that reset sequence for RX PMA has finished.

tx_digitalreset_stat Input

A high on this signal indicates that reset sequence for TX PCS has begun.

A low on this signal indicates that reset sequence for TX PCS has finished.

rx_digitalreset_stat Input

A high on this signal indicates that reset sequence for RX PCS has begun.

A low on this signal indicates that reset sequence for RX PCS has finished.

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