Power Supply Settings - 2023.2 English

Vivado Design Suite User Guide: Power Analysis and Optimization (UG907)

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2023.2 English

Voltage scaling is one of the prominent power saving approaches in AMD devices. There are different voltage rails to supply specific voltages to logic in the device. Each Device Data Sheet lists the recommended operating conditions of these rails. For example, AMD Kintex™ 7 devices can operate with a VCCINT rail between 0.97V and 1.03V. You can make use of voltage scaling to meet your power budget. In the Hardware setup, these rails are supplied by external Power Regulators with fine-grained controls. Because power increases when supply voltage increases, you must provide the exact supply voltage to estimate power accurately.

Important: Specify accurate power supply values in the Power Supply tab of the Report Power dialog box.

To specify power supply voltages in the AMD Vivado™ Integrated Design Environment, enter the values in the Power Supply tab of the Report Power dialog box.

Tip: While moving away from the nominal voltage, ensure that the MIN and MAX voltage specification for the rail can still be met. This does not impact the positive or negative margin available for the power delivery and PDN to supply the required power for transient events. The AC ripple and DC tolerance must remain within the data sheet specification.
Figure 1. Setting Power Supply Values for Report Power
Equivalent Tcl command:
set_operating_conditions -voltage {vccint 0.98 vccaux 1.8}