AT91RM9200 based on 16/32-bit ARM920T core microcontrollers2M parallel flash memory 32M SDRAM (support 64M for option)8M data flash 2 USB Host Port and 1 USB Device Port2 serial ports with 1 simple interface and 1 all connected interface which could connect to RS232 MODEM 1 IrDA interface1 RS485 interface