F-Tile Avalon® Streaming Intel® FPGA IP for PCI Express* User Guide

ID 683140
Date 7/14/2022
Public

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Document Table of Contents

8.2.4.3.2. TX Path

This tab allows you to monitor the transmitter settings for the channel selected.

Table 120.  Transmitter Settings
  Parameters Values Descriptions
TX Status TX Electrical Idle True, False

Indicates if TX is in electrical idle.

True: indicates TX is in electrical idle.

False: indicates TX is out of electrical idle.

TX PLL TX PLL lock Green, Red

Indicates if TX PLL is locked.

Green: TX PLL is locked.

Red: TX PLL is not locked.

TX Equalization TX Equalization Status Not attempted, Completed, Unsuccessful Indicates transmitter equalization status. The TX local and remote parameters are valid only when the value of Equalization status is returned as completed, indicating equalization has completed successfully.
TX Local Preset P0 to P10 Indicates the F-tile transmitter driver preset value as requested by the link partner during the Equalization phase of link training. If the preset is not one of these values, then no value is shown.
Local Pre-shoot coefficient

Depends on the coefficient requested by the link partner.

Indicates F-tile transmitter driver output pre-emphasis (pre-cursor coefficient value).

Local main coefficient

Depends on the coefficient requested by the link partner.

Indicates F-tile transmitter driver output pre-emphasis (main cursor coefficient value).

Local post coefficient

Depends on the coefficient requested by the link partner.

Indicates F-tile transmitter driver output pre-emphasis (post-cursor coefficient value).

Remote Pre-shoot coefficient (†) Depends on the transmitter driver output of the link partner.

Indicates link partner's transmitter driver's output pre-cursor coefficient value, as received by F-tile during the Equalization phase of link training. When F-tile is configured in Endpoint mode, this value corresponds to the coefficient received during Phase 2 of Equalization.

Remote main coefficient (†) Depends on the transmitter driver output of the link partner.

Indicates link partner's transmitter driver's output main cursor coefficient value, as received by F-Tile during the Equalization phase of link training. When F-Tile is configured in Endpoint mode, this value corresponds to the coefficient received during Phase 2 of Equalization.

Remote post coefficient (†) Depends on the transmitter driver output of the link partner. Indicates the link partner's transmitter driver's output post-cursor coefficient value, as received by F-Tile during the Equalization phase of link training. When F-Tile is configured in Endpoint mode, this value corresponds to the coefficient received during Phase 2 of Equalization.
Remote full swing (fs) (†) Depends on the device capability of the link partner. Indicates the full swing value used by the link partner during the Equalization phase of link training.
Remote low frequency (lf) (†) Depends on the device capability of the link partner.

Indicates the low frequency value used by the link partner during the Equalization phase of link training.

Note: (†) Refer to the following sections of the PCI Express* Base Specification Revision 4.0: 4.2.3 Link Equalization Procedure for 8.0 GT/s and Higher Data Rates and 8.3.3 Tx Voltage Parameters.
Figure 79. Example of Transmitter Settings

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