SPRAD67A december 2022 – july 2023 AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
In AM64x family of processors, core supply VDD_CORE can be operated at 0.75 V or 0.85 V. When VDD_CORE is operating at 0.75 V, VDD_CORE shall be ramped up prior to all 0.85 V supplies. VDD_CORE and VDDR_CORE are expected to be powered by the same source so these ramp together when VDD_CORE is operating at 0.85 V.
In AM243x family of processors, core supply VDD_CORE can be operated only at 0.85 V. VDD_CORE and VDDR_CORE are expected to be powered by the same source such that these ramp together.
Core supplies VDDA_0P85_SERDES0, VDDA_0P85_SERDES0_C, VDDA_0P85_USB0 and VDDR_CORE are specified to operate only at 0.85 V.
Core supplies VDD_MMC0 and VDD_DLL_MMC0 are specified to operate at 0.85 V. VDD_MMC0 and VDD_DLL_MMC0 shall be connected to the same power source as VDD_CORE when MMC0 is not used.
For more information, see the Recommended Operating Conditions section in the Specifications chapter of the device-specific data sheet.
AM64x supports 2 core voltages 0.75 V or 0.85 V. The Operating Performance Point (OPP) is not tied to the core voltage. There is no change in performance with 0.75 V or 0.85 V core voltage. The 0.75 V supply provides an option to optimize power and the 0.85 V supply optimizes the number of power rails without change in performance.