Content originally posted in LPCWare by wavemed on Mon Mar 19 15:34:24 MST 2012
Hi Kevin, my problem is similar but I've design a my micro board with the LPC1788 in BGA package with external SDRAM and NOR flash, during debug on the first board I've put a MPU command in initialization code, before of stack assigment. after the reset the device has hang. No more JTAG controal. Some time the Jlink or ULINK shows me CoreSight identifier but it does not enter in debug mode, some time it doesn't connect the JTAG completely. On the second board, I've accidentally change the ".ini" section on the linker from internal flash to the sdram and the second board hang too... My problem is that in my design I've not connect the ISP because it is not necessary to my application, and now the P2.10 pin is alone under the BGA. Now I've only an other board before the revision. I'm really frustrated. Is really not a good feature the disconnection of the JTAG when the processor hang. None has tell me that is necessary to carry out the ISP pin! This should be the first raccomandation on the data sheet or user manual! I'm very disappointed, I don't know if I'll continue the design of my product with such processor...