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MSP430G2332: MSP430G2332 not restarting after reset pulse.

Part Number: MSP430G2332

Hi, 

I use the MSP430G2332 in a sounding application. 

When I power my product on at 24V it starts sounding 

When I send a pulse to 0V (200ms width) on the power supply. The sounder should reset.

When the pulse is over, some devices do not restart and the microcontroller seems to be stuck

We have two Rev's of the G2332 rev B seems to be less sensitive to this

We havn't seen enough with Rev A to be sure but could a difference in the die be causing this, 

this is the device markings I have, i could not find nomencalture guide in datasheet

Micro 1 à 07TG4 ALCG A

Micro 2 à 62TG4 A05L B

Any Help you can provide here will be much appreciated

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