I have several boards that host LM3S* Stellaris MCU. They are different boards but the connections around the MCUs are the same.
Some boards work fine and I can program the MCU using JTAG (LMI FTDI). Others don't work - LM Flash Programmer returns error while connecting.
I might exclude a design error due to the working boards. Perhaps some problems during soldering.
- power supply on MCU pins
- RST and TRST pull-ups on MCU pins
- JTAG connection (and pull-ups) between MCU pins and JTAG programmer
- WAKE, CMOD0, CMOD1 logic levels on MCU pins
What would you do further to find out the cause of the problem? I'm wondering about other measures or test I can do.