I've been looking all over and can't really seem to find a definitive answer ... I would like to run an ATmega32U2 at 16MHz, which needs 5V. Also want to use an Atmel Dataflash, which needs 3.3V, meaning an additional 3.3V regulator or a couple of dropping diodes. Board space is very tight ....
Is it possible for an ATmega32U2/16U2 to supply enough current from the UCAP pin to power an Atmel Dataflash, like an AT45DB041D ?
I've read that it can supply up to 100mA, 50mA, 10mA. It also powers the D-/D+ pads, but there's no indication of how much is required for them. The Dataflash can take up to a max of about 17mA. If the supply is 10mA, there's no way, but for 50mA, yes it probably/possibly can ...
My eyes are bleary - I've probably missed something obvious in a datasheet somehwhere.