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ESD is REAL!

A project log for MSP430FR5994 based wrist watch

Multi-function full color wrist watch using the MSP430FR5994 microcontroller.

samuel-comeauSamuel Comeau 12/28/2018 at 22:410 Comments

So last night I was working on my watch. I had spent most of the day connecting pins on the external of the device to other pins to test for some sort of catastrophic failure. Then I tried to connect it to the MSP430FR5994 launchpad board to program it. It failed. I spent a while trying different combinations of computer restarts, different software and checking the wiring. I noticed whenever the watch was connected that it reset and stayed in a reset mode. This inferred two things. First, the reset pin on the watch is fully functioning. Second, the launchpad ezFET programmer was broken. Signs appear to be consistent with an ESD causing the reset pin to be shorted to ground. There are no other components between the ezFET IC and the watch IC besides a pull-up resistor. I then tried programming the target board on the Launchpad and nothing. I ordered a new one, but it will be about 2 weeks before it gets here. That gives me plenty of time to clean up my work area and get an actual ESD setup. 

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