Part Number:MSP430F5638
Tool/software:TI-RTOS
Part programs OK but RTOS start up hangs in UCS.C at UCS-initFLLSettle.
Although this is a new build, the processor has worked fine with previous builds. The X2 crystal is a NX3225SA-12.000000MHZ with a 10pF cap on each pin. Changing the caps on one board caused a successful initialize and processor USB works. Other boards do not respond but there is a 12MHz oscillation in any case. Because previous builds worked fine this seems like something in the hardware. Some sensitivity in the 12MHz osc causing the USB not to function?
All boards are professionally assembled and look good.
can not include source code but trapped where it hangs:
schematic and layout:
How do I determine if this is indeed a hardware(part) issue or firmware issue?
What can I measure or trace in the Firmware? Why did changing the loading caps change results on one board?