16F54 fickle!

Posted on Feb 6, 2014

The most they do is seemingly run the code, but with a few I/Os unfunctional. e.g. half the LEDs it drives work, aseemingly random half. I have tried the Microchip suggested slow power-up circuit without success. Seems like it shouldn`t need it, because the exact same circuit didn`t need it before, and still doesn`t need it when running with 16F84As. For now I have switched to 16F628As as a short term substitute just to have a

16F54 fickle!
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working model. Those things with their built in brown out reset, power on timers, resets correctly every time in the same circuits. Here`s the schematic without the slow power-on circuit I tried, as it didn`t seem to help any. It shows an OTP part, because the software didn`t have the flash part listed.

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