Low Latency 100G Ethernet Intel® FPGA IP Core User Guide: For Intel® Stratix® 10 Devices

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ID 683100
Date 2/16/2022
Public
Document Table of Contents

7.8.26. Local Transceiver TX EQ 2 Settings for Lane 1

Provides the following Local TX EQ 2 Settings for Lane 1
  • VMAXRULE Override value
  • Enable VMAXRULE Override
  • VODMINRULE Override value
  • Enable VODMINRULE Override
  • VPOSTRULE Override value
  • Enable VPOSTRULE Override
  • VPRERULE Override value
  • Enable VPRERULE Override

Offset: 0xE3

Access: RW

Local Transceiver TX EQ 2 Settings for Lane 1 Fields

Bit Name Description Access Reset
29 lt_vpre_ovrd_en_ln1 Enable VPRERULE Override for Lane 1

1: Use the value of lt_vpre_ovrd to set VPRERULE

0: Use the value of VPRERULE set by the parameters that were used at compile time

RW 0x0
28:24 lt_vpre_ovrd_ln1 VPRERULE Override value for Lane 1

When lt_vpre_ovrd_en=1, this CSR sets the maximum value of the Pre-tap on Lane 1.

VPRERULE must be set to a value greater than INITPREVAL.

RW 0x0
22 lt_vpost_ovrd_en_ln1 Enable VPOSTRULE Override for Lane 1

1: Use the value of lt_vpost_ovrd to set VPOSTRULE.

0: Use the value of VPOSTRULE set by the parameters that were used at compile time.

RW 0x0
21:16 lt_vpost_ovrd_ln1 VPOSTRULE Override value for Lane 1

When lt_vpost_ovrd_en=1, this CSR sets the maximum value of the Post-tap on Lane 1.

VPOSTRULE must be set to a value greater than INITPOSTVAL.

RW 0x0
13 lt_vodmin_ovrd_en_ln1 Enable VODMINRULE Override for Lane 1

1: Use the value of lt_vodmin_ovrd to set VODMINRULE

0: Use the value of VODMINRULE set by the parameters that were used at compile time

RW 0x0
12:8 lt_vodmin_ovrd_ln1 VODMINRULE Override value for Lane 1

When lt_vodmin_ovrd_en=1, this CSR sets the minimum setting of VOD allowed during link training for Lane 1.

VODMINRULE must be set to a value less than INITMAINVAL.

VODMINRULE must also be set to a value greater than VMINRULE.

RW 0x0
5 lt_vodmax_ovrd_en_ln1 Enable VMAXRULE Override for Lane 1

1: Use the value of lt_vodmax_ovrd to set VMAXRULE

0: Use the value of VMAXRULE set by the parameters that were used at compile time

RW 0x0
4:0 lt_vodmax_ovrd_ln1 VMAXRULE Override Value for Lane 1

When lt_vodmax_ovrd_en=1, this CSR sets the maximum Voltage allowed during link training for Lane 1.

VMAXRULE must be set to a value greater than INITMAINVAL.

Note that this value also changes PREMAINVAL.

RW 0x0

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