Hi I have designed my own board, the problem is that when I flash the MCU for the first time,j-link and keil will detect the chip correctly and programs it, but when I want to debug it or program it for the next time it would not detect the MCU, note that if I press p2_7 to low value the j-link will detect the MCU again, and flash magic can detect the MCU and flash it, the problem is that my Code would not run and the Jtag can not detect the MCU,it seems that the MCU will hange in the Boot mode!!!
Do you have any Idea what's going on wrong?