L- and H-Tile Transceiver PHY User Guide

ID 683621
Date 7/20/2022
Public
Document Table of Contents

2.5.1.12.1. Master Channel in Bonded Configurations

For PCIe, TX PMA and PCS bonding must be enabled. There is no need to specify the PMA Master Channel because of the separate Master CGB in the hardware. However, you must specify the PCS Master Channel through the Native PHY IP Parameter Editor. You can do either one of the following:
  • Specify the PCS Master Channel through the Logical PCS Master Channel parameter. When you choose any one of the data channels (part of the bonded group) as the logical PCS Master Channel, you must ensure that the logical PCS master channel aligns with Physical Channel 1 or 4 in a given transceiver bank.
  • Select AUTO in the Logical PCS Master Channel parameter. This chooses the logical PCS master channel according to Logical PCS Master Channel for PIPE Configuration when the AUTO Selection is Enabled. The transceiver Native PHY IP automatically selects the center channel to be the master PCS channel. This minimizes the total starting delay for the bonded group.When using the AUTO selection, the fitter issues an error when the chosen Logical PCS master channel does not align with Physical Channel 1 or 4 of the bank.
Note: The auto speed negotiation (ASN) block and Master CGB connectivity is only available in the hardware of channels 1 and 4 of a given transceiver bank.
Table 116.   Logical PCS Master Channel for PIPE Configuration when the AUTO Selection is Enabled
PIPE Configuration Logical PCS Master Channel # (default)
x1 0
x2 1 39
x4 2 39
x8 4 39
x16 40 8 39

The following figures show the default configurations:

Figure 111. x2 Configuration (for Intel® Stratix® 10 GX 10M Devices)
Figure 112. x2 Configuration (Except Intel® Stratix® 10 GX 10M Devices)
Note: The physical channel 1 aligns with logical channel 1 of transceiver bank 0.
Figure 113. x4 Configuration (for Intel® Stratix® 10 GX 10M Devices)
Figure 114. x4 Configuration (Except Intel® Stratix® 10 GX 10M Devices)The figure below shows a way of placing 4 bonded channels. In this case, the logical PCS Master Channel number 2 must be specified as Physical channel 4 of bank 0.
Figure 115. x8 Configuration (for Intel® Stratix® 10 GX 10M Devices)
Figure 116. x8 Configuration (Except Intel® Stratix® 10 GX 10M Devices)For x8 configurations, Intel recommends you choose a master channel that is no more than four channels away from the farthest slave channel.
Figure 117. x16 ConfigurationFor x16 configurations, Intel recommends you choose a master channel that is a maximum of eight channels away from the farthest slave channel.
Note: The physical channel 2 aligns with logical channel 0. The logical PCS master channel 8 is specified as Physical channel 4 of bank 1.
Figure 118. x4 Alternate ConfigurationThe figure below shows an alternate way of placing 4 bonded channels. In this case, the logical PCS Master Channel number 2 must be specified as Physical channel 1 of bank 1.
39 Ensure that the Logical PCS Master Channel aligns with Physical Channel 1 or 4 in a given transceiver bank.
40 Not applicable to Intel® Stratix® 10 GX 10M devices.

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