Intel® Arria® 10 Transceiver PHY User Guide

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

8.5.2.1. XCVR_A10_RX_ADP_VGA_SEL

Pin planner or Assignment Editor Name

Receiver Variable Gain Amplifier Voltage Swing Select

Description

The variable gain amplifier (VGA) amplifies the signal amplitude and ensures a constant voltage swing before the data is fed to the CDR for sampling. This assignment controls the VGA output voltage swing when adaptation mode of VGA is set to manual. The default value is set to RADP_VGA_SEL_4 for VGA Output Voltage Swing Setting 4.

Default values for VGA if VGA are not set exclusively.

For PCIe* Gen1 & Gen2: default value is RADP_VGA_SEL_4.

For PCIe Gen3: default value is RADP_VGA_SEL_4.

For datarate > 17.4 Gbps, default value is RADP_VGA_SEL_4.

For RX_LINK = LR and CTLE mode = NON_S1_MODE: default value is RADP_VGA_SEL_4.

For RX_LINK = LR and CTLE mode = S1_MODE and datarate <= 4.5Gbps: default value is RADP_VGA_SEL_4.

For RX_LINK = LR and CTLE mode = S1_MODE and datarate > 4.5Gbps: default value is RADP_VGA_SEL_4.

For RX_LINK = LR and CTLE mode = S1_MODE and datarate > 4.5Gbps and data rate ≤ 17.4Gbps,: default value is RADP_VGA_SEL_4.

For RX_LINK = SR and CTLE mode = NON_S1_MODE and datarate <= 4.5Gbps: default value is RADP_VGA_SEL_4.

For RX_LINK = SR and CTLE mode = NON_S1_MODE and datarate > 4.5Gbps: default value is RADP_VGA_SEL_4.

For RX_LINK = SR and CTLE mode = S1_MODE: default value is RADP_VGA_SEL_4.

Table 313.  Available Options

Value

Description

RADP_VGA_SEL_<0 to 7>

VGA Output Voltage Swing Setting <0 to 7>

Assign To

RX serial data pin.

Syntax

set_instance_assignment -name XCVR_A10_RX_ADP_VGA_SEL <value> -to <rx_serial_data pin name>

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