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Why would the BKGD port short to vcc when connecting USB ML-12E programmer?

Question asked by Tom Hoyer on Jun 18, 2015
Latest reply on May 3, 2018 by RADEK SESTAK

Happened on three 9S12X processor over the last two weeks. Been using same method of programming and processor for years without issue

 

BKGD pulled up to 5v with 3.3k as is RESET.

 

Processor previously programmed fine, reconnecting programmer and can not recognize processor. Checking the BKGD pin it is shorted to VCC. Processor runs existing code fine, can not reprogram.

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