We have designed a custom board based on iMX257 processor. Now we are trying to download code(u.boot) through UART(Boot Pins are set to 1:1). It gives error "Connection error. Please reset the board and make sure the board in bootstrap mode".
I have a doubt. Does first code which gets execute after RESET remains in Internal Boot-ROM and that comes with Processor or We have to burn the Boot-ROM code also.
Thanks & Regards,