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Old 01 October 2019, 00:07   #105
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Join Date: Dec 2018
Location: UK
Posts: 686
I'm glad you got it working!

Yes, strange how your Gotek is behaving like that with the JC pin.

You can find the schematics of the Gotek at:


But I've summarised the jumper pins as such:

VSS is ground, so when you are making the jumper you are pulling that pin to ground. I believe it is normally pulled up to VCC inside the STM32 chip itself. The JC pin connects to pin 21 (PB1) on the STM32 chip.

You can test/verify all of this with a multimeter, if you have one.

I would also check the underside of your Gotek board and see if there might be any shorts or broken traces.
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