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MSP430F6736: Security fuse gets automatically blown.

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Part Number:MSP430F6736

Hi,
We are using MSP 430 FET UIF programmer & Lite FET-Pro430 Elprotronic s/w to program MSP4306736 MCU. For around 10% of the MCUs, we are facing blown security fuse issue, where we are unable to communicate with MCU.
  1. Can this state be reversed? How?
  2. Apart from manual triggering are there any other possibilities for triggering the fuse for example ESD(Electro Static Discharge). If yes how to detect the same & can it be due to high humidity. 
Thanking you,
Ugra

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