Hello,
im working on an custom board for the at91sam9g45.

Is the usb necessary, or can i flash the nand with the jtag?
i ve at the moment no at91 sam ice kit.

is the bootstrap and sam-ba on the at91 installed on factory?

after booting the board i can disconnect the power supply and the board is still working is it connected with usb.
how does it work?
i ve attach the schematic but i dont know how the +5v USB supply all the rest parts.

thx a lot for your answer