Hello all,
I use the TM4C123AH for about 3 years to produce our boards, on about 1000 mounted boards I had problems with about 20 boards.
I can not program the boot using Jtag 10 pin (Keil Ulink-2), the TMS pin is locked to 3.3V, measured 180 Ohm with a multimeter between TMS and + 3.3V, and 690 Ohm between TMS and ground.
Sometimes with the TMS pin I encountered problems with the TCLK pin (1.4KOhm to ground) or TDI (1.5KOhm to ground)
Replacing the microprocessor the card works.
TMS, TCLK, TDO, TDI are only connected to the microcontroller, TMS, TCLK and TDI have a pullup of 100K to 3.3V.
Someone has ever encountered this problem.