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Re: this comment in the code:
// *** ISP DATA CORRUPTION WARNING1!! ALWAYS REMOVE C24 (C27?) (or as marked) it's a 10nF on the ISP HEADER'S MOSI line (PA ctrl out) (PB3) of the ISP header,
// and disconnect the internal mic by plugging in a disconnected Jack plug. FAILING TO DO THIS CAN CORRUPT YOUR MCU CHIP!!
I've removed C24, but not C27 (on my "white buttons" v3 PCB). I haven't yet tried writing the flash, but reading it (I was hoping to back up the stock firmware -- just being cautious and trying to avoid bricking my uSDX :) ) gives me back an empty file (or full of 0xFF if I use avrdude -A). I'm using a USBasp.
Is the presence C27 the cause of this issue, or is it something else?
I think it would be nice to clarify this comment for the benefit of people who are doing this for the first time and aren't feeling confident :)
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