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

ID 683872
Date 12/15/2021
Public

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3.14.1.1. Enabling Loopback

Use the following register settings to enable FHT PMA loopback modes.
Table 84.   Loopback Mode Register Settings
Loopback Mode Register Description
Serial internal loopback 0x45800[14] Set 1'b1 to enable serial internal loopback. Set 1'b0 to disable serial internal loopback.
Parallel TX to RX loopback 0x45800[0] Set 1'b1 to enable parallel TX to RX loopback. Set 1'b0 to disable parallel TX to RX loopback.
Reverse parallel RX to TX loopback 0x45804[19] Set 1'b1 to enable reverse parallel RX to TX loopback. Set 1'b0 to disable reverse parallel RX to TX loopback.

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