Tool/software:
Hi Team
My customer has a question about USB boot mode.
It says in the schematic review checklist that:
6.1.5.2.1 Notes for USB Boot Mode
USB0 interface supports boot. When the USB0 is configured for DFU boot mode, 3.3 V supply (permanent or
switched) is not recommended to be connected to the USB0_VBUS pin. No permanent supply (equivalent to the
divider value) is allowed to be connected to the USB0_VBUS.
What is the reason that a 3.3V supply is not recommended?
Best regards,
Mari Tsunoda