port 0 pin 0 ==p0_0

Hi Dialog,
We have developed a custom board using Da14583 for our application in which PortO pinO is connected to a Led. We are using dual image firmware, wherein advance bootloader along with both images is stored in SPI flash.There is no such line in firmware to make the led to blink. It blinks sometimes when uart programming via P0_2 P0_3 does not succeed and we need to reprogram the chip.What may be the reason for the led to blink?
谢谢,
Regards,
Dhiraj