F-Tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 9/29/2025
Public
Document Table of Contents

A.6.3.3. F-Tile FGT Receiver Equalization Parameters

When auto adaptation is ON, you cannot modify the VGA gain, High Frequency Boost, and DFE tap values as they are read-only using the F-Tile FGT Attribute Access Sequence. When you disable auto adaptation for manual tuning, you can only change VGA gain, High Frequency Boost and DFE tap 1 values using the registers in the table below. Other DFE taps are read-only.
Table 127.  F-Tile FGT Receiver Equalization ParametersFor read and write in manual tuning mode only.

Parameters

Read/Write Registershgz1657066257871.html#hgz1657066257871__fn_ch0 Min Max Step Size
VGA Gain Read Write 0x41BB8[31:25] 0 63 1
High Frequency Boost Read Write 0x41BB8[24:19] 0 63 1
DFE tap 1 Read Write 0x41BB0[11:6] 0 63 1
DFE tap 2 Read only 0x41914[14:8] -63 63 1
DFE tap 3 Read only 0x41914[22:16] -63 63 1
DFE tap 4 Read only 0x41914[29:24] -31 31 1
DFE tap 5 Read only 0x41918[5:0] -31 31 1
DFE tap 6 Read only 0x41918[13:8] -31 31 1
DFE tap 7 Read only 0x41918[21:16] -31 31 1
DFE tap 8 Read only 0x41918[29:24] -31 31 1
DFE tap 9 Read only 0x4191C[5:0] -31 31 1
DFE tap 10 Read only 0x4191C[13:8] -31 31 1
DFE tap 11 Read only 0x4191C[21:16] -31 31 1
DFE tap 12 Read only 0x4191C[29:24] -31 31 1
DFE tap 13 Read only 0x41920[5:0] -31 31 1
DFE tap 14 Read only 0x41920[13:8] -31 31 1
DFE tap 15 Read only 0x41920[21:16] -31 31 1
DFE tap 16 Read only 0x41920[29:24] -31 31 1