I got the DA14853 development kit DA14583F01DEVKT-B and installed Keil MDK, Jlink driver and FTDI driver following the user manual UM-B-025. Everything goes fine but when I plugged the board into the PC using the USB cable there is no new device detected. D5 (red) is blinking. D4 is off. D1 is on. Look like the Atmel chip on the kit is not programmed? Could anybody help me on this?