I used the ULINK JTAG debugger to debug Keil MCB2130 board for some days. They worked well. But when I touched two I/O pins to 5.5V carelessly, these two I/O pins damaged. The LPC2138 also can work by downloading firmware from ISP. But from that time, the ULINK can't be detected by Keil uVision software. I want to know if it is possible for ULINK to be damaged, or ULINK JTAG can not be detected just because the CPU device has bad I/O? Please give me some ideas, I really appreciate it.
Message
ULINK doesn't work
2006-03-22 by beiyong2003