Other Parts Discussed in Thread: MSP430G2432
We are seeing an intermittent issue on our product where the RST/NMI pin appears to be pulling something on the order of 10+ uA into the IC. The design uses a 100k pullup to 3.0 Volts and a 0.01uF cap on the reset line. There is not other control of the reset.
On some startups, the RESET pin appears to be pulling a large amount of current. The result is a voltage drop across the 100k pullup that varies from small up to and included 1.4 Volts, equivalent to 14 uA into the MSP! Once the issue is seen, subsequent power off and startups do not clear the problem. When left off for a long time (overnight) there is some evidence that the problem does not occur on the first power up after that.
The same issue as been reported on a few threads, such as this one of April 20, 2017. "MSP430G2432: RESET pin drop issue on MSP430G2432". That thread said that it was resolved offline. I would like to know how that was resolved, because I am having the same problem.
FYI, I have looked for flux contamination and possible shorting on the PCBA, and have found no evidence of either.
Thank you!
Chad