V-Series Transceiver PHY IP Core User Guide

ID 683171
Date 7/26/2022
Public
Document Table of Contents

10.4.6.3. Reset Controls –Manual Mode

Table 144.  Reset Controls –Manual Mode
Word Addr Bits R/W Register Name Description
0x044 [31:0]

[31:4,0] are reserved

RW reset_fine_control You can use the reset_fine_control register to create your own reset sequence. If you disable Enable embedded reset controller on the General Options tab of the MegaWizard Plug-In Manager, you can design your own reset sequence using the tx_analogreset, rx_analogreset, tx_digitalreset, rx_digitalreset, and pll_powerdown which are top‑level ports of the Custom Transceiver PHY. By default, the CDR circuitry is in automatic lock mode whether you use the embedded reset controller or design your own reset logic. You can switch the CDR to manual mode by writing the pma_rx_setlocktodata or pma_rx_set_locktoref registers to 1.

It is safe to write 0s to reserved bits.

[3] RW reset_rx_digital Writing a 1 causes the internal RX digital reset signal to be asserted, resetting the RX digital channels enabled in reset_ch_bitmask. You must write a 0 to clear the reset condition.
[2] RW reset_rx_analog Writing a 1 causes the internal RX analog reset signal to be asserted, resetting the RX analog logic of all channels enabled in reset_ch_bitmask. You must write a 0 to clear the reset condition.
[1] RW reset_tx_digital Writing a 1 causes the internal TX digital reset signal to be asserted, resetting all channels enabled in reset_ch_bitmask. You must write a 0 to clear the reset condition.