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3.4.3.6 SoC Power
The Core voltage of the AM64x SoC can be powered by 0.75 V or 0.8 V or 0.85 V based on
the power optimization requirement. It is recommended to use a single voltage source when the SoC
Core voltage (VDD_CORE) and SoC Array Core Voltage (VDDR_CORE) and other array core voltages
(VDDA_0P85_SERDES0_C, VDDA_0P85_SERDES0, VDDA_0P85_USB0, VDD_DLL_MMC0, VDD_MMC0) is
0.85 V. In cases where the SoC Core voltage is required to be 0.75 V or 0.8 V and SoC Array Core Voltage and
other Array Core voltages is required to be 0.85 V then there needs to be separate voltage supply for the SoC
Core voltage and an separate supply for the SoC Array Core voltages.
This EVM has a provision for providing single voltage supply or different voltage supply to the SoC Core
and SoC Array Core and other Array Core Voltages and based requirement. This can be configured by the
placement of resistors as mentioned in
Figure 3-8 .
Figure 3-8. Core Supply and Array Core Supply Options
The SoC has different IO groups. Each IO group is powered by specific power supplies as shown in Table 3-6 .
Table 3-6. SoC Power Supply
SI.No. Power Supply SoC Supply Rails IO Power Group Power
1 VDDA_CORE VDDA_0P85_SERDES
0
SERDES0 0.85
VDDA_0P85_SERDES
0_C
0.85
VDDA_0P85_USB0 USB0 0.85
VDD_MMC0 MMC0 0.85
2 SoC_DVDD3V3 VDDS_MCU MCU 3.3
VDDA_3P3_USB0 USB0 3.3
VDDSHV0 General 3.3
VDDSHV1 PRG0 3.3
VDDSHV2 PRG1 3.3
VDDSHV3 GPMC 3.3
3 VDDA_1V8_MCU VDDA_MCU MCU 1.8
4 VDDA_MCU_ADC VDDA_ADC ADC0 1.8
5 VDDA_1V8_SERDES VDDA_1P8_SERDES0 SERDES0 1.8
6 VDDA_1V8_USB0 VDDA_1P8_USB0 USB0 1.8
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16 AM64x GP EVM User's Guide SPRUIX0B – FEBRUARY 2021 – REVISED MARCH 2021
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