I have a few boards with an LPC1817 on which the JTAG is no longer working.
I have checked all the conditions that may disable the JTAG.
- Pin 28 DBGEN is not connected and pulled up internally
- OTP bank 3 is not progammed
- The CRP is not active
- CREG5 is not loaded
Can anybody give me a hint why the JTAG stops working.
I have connected both LPC-Link2 and J-LinkPro without success.
I can only program through ISP.