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problem with 754410?

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Hey guys, i'm using a 754410 hbridge as a motor driver for a little 3.3 volt radioshack motor. Having a wierd problem though. Whenever I start running my code, nothing happens, but then if I pull out my MM and start checking pins to make sure everything is where it's supposed to be, well, then it starts working. I thought it might be a loose connection but have eliminated that from possibility. any ideas what this could possibly be?

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It is a 5 volt chip, I have the 5volts coming from T0 on the launchpad. then it's basically p1.0 and 1.1 are the select bits, and 1.2 is the enable bit. it works fine.. after i poke at it with my MM. but not before. can't figure it out for the life of me. i'll try to draw up a schematic and take a pic when I get home.

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