I have an MSP430F133 on a multi-layer board with a GND plane. I'm using the TPS3839 brownout reset component and have verified that it holds reset for 200mS after the 3.3V supply is valid. Occasionally, the Device does not start and when it doesn't start, if I force the reset pin active (to GND) it does not reset. The device is not warm so I don't think it's latched up. If I unplug the AC power cord to the AC/DC power supply, I have to wait about 10 seconds for the 3.3V supply to drop to almost GND before the MSP430 will recover for the next power up. The 8MHz clock looks fine. For what reasons will the MSP430 not react to a reset? Any ideas? thank you in advance.
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