Intel® Agilex™ Power Management User Guide

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ID 683373
Date 9/06/2022
Public
Document Table of Contents

5.1.1. SmartVID Feature Implementation in Intel® Agilex™ Devices

Devices supporting the SmartVID feature have a VID-fused value programmed into a fuse block during device manufacturing. The VID-fused value represents a voltage level in the range of 0.6 V to 1.0 V. Each device has its own specific VID-fused value.

The boosted VID-fused value is sent to the external regulator or system power controller through the PMBus interface. Upon receiving the boosted VID-fused value, an adjustable regulator tunes the VCC and VCCP voltage levels to the voltage specified by the VID-fused value.

Intel® Agilex™ devices perform the SmartVID setup in the early stage of the configuration process. The SmartVID process continues to monitor the VCC and VCCP voltage rails in user mode. The Power Manager monitors the temperature and adjusts the voltage when required. For more information, refer to the Temperature Compensation section.

Table 14.  SmartVID Regulator Requirements
Specification7 Value
Voltage range 0.6 V – 1.0 V
Voltage step 5 – 10 mV
Ramp time
  • Non-CvP—10 mV/10 ms to 10 mV/20 µs
  • Configuration via Protocol (CvP)—10 mV/60 µs to 10 mV/20 µs 8
Table 15.  Supported Voltage Output Format for Intel® Agilex™ Devices with the –V, –E, and –X Power Options
Voltage Output Format Operating Modes
PMBus Master Mode PMBus Slave Mode
Linear mode Yes No
VID mode No No
Direct mode Yes Yes, with coefficient m=1, b=0, and R=0. Translated output voltage is in millivolts (mV).
7 To ensure the specifications are meeting requirements, refer to your selected voltage regulator data sheet.
8 When the system is required to support the CvP functionality and meet the PCI Express* ( PCIe* ) link-up timing budget during the initial power up, the minimum ramp time is 10 mV/60 µs.

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