Agilex™ 7 Power Management User Guide

ID 683373
Date 11/25/2024
Public
Document Table of Contents

3.5. Floating Voltage

When you power up the device, you may observe a floating voltage may be observed on the power rails as listed in the following table.
Table 7.  Power Rails Floating Voltage for the Agilex™ 7 F-Series and I-Series
Power Rail Approximate Floating Voltage Value (V)
VCCPT 0.366
VCCIO_PIO 0.340
VCCA_PLL 0.095
VCCRCORE 0.500
VCCFUSEWR_SDM 0.229–1.360
VCCCLK_GXE[R1] 0.460
VCCRT_GXP[L1,L3] 0.547
VCCEHT_FHT_GXF[L,R] 0.091
VCCED_GXR[L,R] 0.035
VCCL_HPS 0.096
Table 8.  Power Rails Floating Voltage for the Agilex™ 7 M-Series
Power Rail Impacted By Approximate Floating Voltage Value (V)
VCCIN_PIO VCCPT 0.6
VCCRCORE VCC 0.49

This is an expected behavior and causes neither functional nor reliability issue to the device, provided you follow the power-up or power-down sequence. The observed behavior can be avoided if the power supplies are not left to float before the device ramp up and after the device ramp down.