Intel® Arria® 10 Transceiver PHY User Guide

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

1.2.2.2. The GT Transceiver Channel

The GT transceiver channels are used for supporting data rates from 17.4 Gbps to 25.8 Gbps. The PCS Direct datapath that bypasses all PCS blocks is the primary configuration used to support GT data rates from 17.4 Gbps to 25.8 Gbps. Alternatively, the Enhanced PCS in Basic low latency configuration can also be used to support GT data rates from 17.4 Gbps to 25.8 Gbps. The GT transceiver channels can also be configured as GX transceiver channels. When they are configured as GX transceiver channels, the Standard PCS, Enhanced PCS, and PCIe* Gen3 PCS are available and they support data rates from 1.0 Gbps to 17.4 Gbps.

Figure 17. GT Transceiver Channel in Full Duplex Mode Operating Between 17.4 Gbps and 25.8 Gbps


Table 7.  PCS Types and Data Rates Supported by GT Channel Configurations
GT Channel Configuration PCS Type Data Rates Supported
GT Standard PCS Not available for GT configuration
Enhanced PCS 17.4 Gbps to 25.8 Gbps7
PCIe Gen3 PCS Not available for GT configuration
GX Standard PCS 1.0 Gbps to 12 Gbps
Enhanced PCS 1.0 Gbps 8 to 17.4 Gbps
PCIe Gen3 PCS 8 Gbps
Note:
  1. The GT channels can also operate in PCS Direct configuration for data rates from 1.0 Gbps to 25.8 Gbps. The PCS Direct datapath that bypasses all PCS blocks is the primary configuration used to support GT data rates from 17.4 Gbps to 25.8 Gbps. To operate GX and GT transceiver channels in PCS Direct designated data rates, refer to the Intel® Arria® 10 Device Datasheet for more details on power supply, speed grade, and transceiver configurations requirement.
  2. The minimum operational data rate is 1.0 Gbps for both the transmitter and receiver. For transmitter data rates less than 1.0 Gbps, oversampling must be applied at the transmitter. For receiver data rates less than 1.0 Gbps, oversampling must be applied at the receiver.
  3. To operate GX and GT transceiver channels with the PCS at designated data rates, refer to the Intel® Arria® 10 Device Datasheet for more details on power supply, speed grade, and transceiver configurations requirement.
7 The Enhanced PCS must be configured in Basic low latency mode to support data rate range from 17.4 Gbps to 25.8 Gbps.
8 Applies when operating in reduced power modes. For standard power modes, the Enhanced PCS minimum data rate is 1600 Mbps.

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