Stratix® 10 Power Management User Guide

ID 683418
Date 7/08/2024
Public
Document Table of Contents

2.2.1.2. SDM Power Manager

Figure 2. SDM Power Manager Block Diagram

In Stratix® 10 devices, the SmartVID feature is managed by the SDM subsystem. The SDM subsystem is powered up after VCC and VCCP voltage levels are powered up to 0.9V. The SDM Power Manager reads the VID-fused value and communicates this value to the external voltage regulator through the PMBus interface.

The SDM Power Manager has the following stages:

  • Initial stage
    • Sets the external voltage regulator to supply power to VCC and VCCP to the voltage level based on the VID-fused value and the device temperature.
    • Configures the FPGA and switches the FPGA to user mode.
  • Monitor stage
    • Monitors temperature and updates the VCC and VCCP.

You cannot use the SDM power manager to manually read data from, or write commands to a voltage regulator module, or any other agent on the PMBus. When operating as a PMBus master, the Stratix® 10 PMBus interface is designed to only provide communications across the PMBus that are required for the SmartVID logic to control the voltage regulator module that is supplying power to VCC or VCCP . When the FPGA is in the PMBus slave mode, the external master reads data from, and send commands to the voltage regulator module.