Intel® Arria® 10 Transceiver PHY User Guide

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ID 683617
Date 3/28/2022
Public
Document Table of Contents

2.7.12.1. Master Channel in Bonded Configurations

For PCIe*, both the PMA and PCS must be bonded. 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. You can choose any one of the data channels (part of the bonded group) as the logical PCS Master Channel.

Note: Whichever channel you pick as the PCS master, the fitter selects the physical CH1 or CH4 of a transceiver bank as the master channel. This is because the ASN and Master CGB connectivity only exists in the hardware of these two channels of the transceiver bank.
Table 196.   Logical PCS Master Channel for PIPE Configuration
PIPE Configuration Logical PCS Master Channel # (default)
x1 045
x2 145
x4 245
x8 4 45

The following figures show the default configurations:

Figure 109. x2 Configuration
Note: The physical channel 0 aligns with logical channel 0. The logical PCS Master Channel 1 is specified as Physical Channel 1.
Figure 110. x4 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 4.


Figure 111. x8 ConfigurationFor x8 configurations, Intel recommends you choose a master channel that is a maximum of four channels away from the farthest slave channel.


Note: The physical channel 0 aligns with logical channel 0. The logical PCS master channel 4 is specified as Physical channel 4.
Figure 112. 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.


As indicated in the figures above, the fitter picks either physical CH1 or CH4 as the PCS master in bonded configurations for PIPE.

Figure 113. x4 Configuration with the Master Channel Adjacent to a Hard IP

The figure below shows the placement of a x4 PIPE configuration with the Logical PCS Master Channel that is adjacent to a Hard IP.

Figure 114. x4 Configuration with the Master Channel not Adjacent to a Hard IPThe figure below shows the placement of a x4 PIPE configuration with the Logical PCS Master Channel that is not adjacent to a Hard IP.
45 Ensure that the Logical PCS Master Channel aligns with Physical Channel 1 or 4 in a given transceiver bank.

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