SPRAD21G May 2022 – December 2024 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP , AM62A3 , AM62A3-Q1 , AM62A7 , AM62A7-Q1 , AM62D-Q1 , AM62P , AM62P-Q1
USB0 interface supports USB DFU boot mode. When the USB0 is configured for device firmware upgrade (DFU) boot mode. Permanent or switched 3.3V supply is not recommended to connect directly to the USB0_VBUS pin. Connecting a permanent supply is not recommended (equivalent to the divider value) to the USB0_VBUS pin since connection of supply without resistor divider violate fail-safe operation.
A 5V supply from the host (switched) connected through the USB connector is recommended to connect to the processor USB0_VBUS pin through the resistor voltage divider, as per the processor-specific data sheet recommendations. The zener diode can be deleted and the two resistors can combined to a 20kΩ resistor for the USB VBUS Detect Voltage Divider, Clamp Circuit if the custom board design does not apply a VBUS potential greater than 5.5V, and the supply is on-board.