Other Parts Discussed in Thread: EK-TM4C1294XL
I am attempting to program a TM4C1294NCPDT on a custom board using the debugger on a EK-TM4C1294XL launch pad. When I attempt to program the device using CCS I get an "Error connecting to the target".
I have followed the instructions in the spma075 application report "Using TM4C12x Devices Over JTAG Interface" on page 17 to connect the debugger to the off-board device. I have also tried the unlock sequence using LM Flash Programmer on page 21 but I get the same error.
I have gone through the check list on page 27 if a JTAG connection is not working. My target device has its VDD and VDDA supply rails at 3.3V, the VDDC rail is at 1.2V, the reset pin is pulled up to 3.3V, I am using an external 25Mhz oscillator on OSC0 and it is working but I do not have RBIAS populated (I don't think I need it because I am not using the ethernet feature).
I have checked for shorts and continuity from the JTAG header to the target.
Attached is the spma075 application report.
