Julius Werner wrote:
> > As I have access to a DediProg EM100Pro [1] including a 10-Pin Split
> > Cable with a grabber on the hold pin [2], and a clip, I was wondering if
> > I can hook it up without soldering to boot from (like an external chip).
>
> I mean... I can at least tell you that we do this in practice all the
> time (with generally no issues). The SPI flash is not electrically
> isolated, so yes, you're gonna leak some current into the SoC when you
> do this (there are 100Ohm limiting series resistors so it's not a
> complete short). I've never heard of a Chromebook board dying from
> this but I can't legally guarantee you anything, of course.
I don't think there can be a problem with current leaking, but on some
boards HOLD is tied directly to VCC, without a pullup.
In that case there's no way to work with a clip, the whole chip or at
least the HOLD pin has to be disconnected from the board, and HOLD
tied low instead.
//Peter
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