E-Tile Transceiver PHY User Guide

ID 683723
Date 9/30/2022
Public
Document Table of Contents

6.1. When Is Reset Required?

You can reset the transmitter (TX) and receiver (RX) data paths independently or together. To ensure that transceiver channels are ready to transmit and receive data, you must properly reset the transceiver PHY after any of the following events.
Note: The reset requirements in the following table are also applicable when you run simulations with the E-Tile Transceiver Native PHY IP core.
Table 58.  Digital Reset Conditions
Event Reset Requirement
Device configuration

Requires the following resets which can be done in any order or at the same time

  • Requires toggling the TX and RX resets after device configuration but before there is any traffic
  • Requires toggling reconfig_reset after device configuration but before actual use of the NPDME, MIF streamer, PMA configuration, or control and status Avalon® memory-mapped interface registers
Note: Failure to follow the reset guidelines prevents tx_ready and rx_ready to assert.
Channel dynamic reconfiguration Requires holding the TX and RX in analog and digital reset before reading or writing registers for the PMA that may cause a rate change
Any event requiring a PMA reset such as a reference clock changes or serial data loss Requires a transceiver channel reset

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