Intel® Arria® 10 Transceiver PHY User Guide

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

8.4.2. XCVR_A10_RX_TERM_SEL

Pin planner or Assignment Editor Name

Receiver On-Chip Termination

Description

Controls the on-chip RX differential termination. For data rates higher than 25 Gbps, set the termination resistance to 85 Ohm.

Note: For protocols such as QPI, you need to set the termination setting to R_R2. For all the other protocols, you can either set this setting to R_R1 or R_R2. The default value set for all the protocols other than QPI depends upon the data rate. When the data rate is less than or equal to 17.4 Gbps, the default value is R_R1. When the data rate is greater than 17.4 Gbps, the default value is R_R2.
Table 308.  Available Options

Value

Description

R_EXT0

Tristate

R_R1

100 Ohm

R_R2

85 Ohm

Assign To

RX serial data pin.

Syntax

set_instance_assignment -name XCVR_A10_RX_TERM_SEL <value> -to <rx_serial_data pin name>

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