SPRAD21E May 2023 – February 2024 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP , AM62A3 , AM62A3-Q1 , AM62A7 , AM62A7-Q1 , AM62P , AM62P-Q1
Most of the processor IOs are not fail-safe. For information on fail-safe IOs, see the device-specific data sheet. It is recommended to power IO supply of attached devices from the same power source as the respective processor Dual-voltage IO domains (VDDSHVx supply rail) to ensure the system never applies potential to an IO that is not powered. This is needed to protect the IOs of processor and attached devices.
For more information on power-sequencing requirements between processor and attached devices including signal isolation for fail-safe operation, see the below FAQ:
[FAQ] AM625 / AM623 Custom board hardware design – Power sequencing between SOC (Processor) and the Attached devices. This is a generic FAQ and can also be used for AM625SIP / AM625-Q1 / AM620-Q1, AM62A7 / AM62A3 and AM62P / AM62P-Q1 family of processors.
A valid supply voltage for the VDDSHVx IO supplies must be present before any input is applied to the associated processor IOs or peripherals.
VDDSHVx IO supplies and the associated CAP_VDDSx capacitors must be connected irrespective of the usage of the processor IOs or peripherals.