Re: [flashrom] Trouble disabling write-protection on Chromebook

> Darn, still no luck then...
>
> Well, I guess all that's left is to try finding a multimeter and seeing
> if
> /WP is being held low somehow. Also, do you have an external programmer
> such as a Bus Pirate?

I now have a Bus Pirate. I also have a multimeter. What is the best way to
check if /WP is being held low?

Trouble disabling write-protection on Chromebook

[Cory Henderson]

With the chromebook powered on (be careful), and your multimeter in DC volt
mode, touch one probe to any metallic part of the computer chassis or any
known ground (could even use the ground pin of the flash), then touch the
other probe to the /WP pin (there was a datasheet sent out before with
pictures of all of the different packages and their pinouts). If your meter
reads 0V then the pin is being pulled down and the hardware /WP is being
enforced. If it reads 1.8V or something around there then it might be a bad
chip or something off in flashrom.

On Mon, Jan 13, 2014 at 10:13 PM, <
[e-mail]> wrote:
> > Darn, still no luck then...
> >
> > Well, I guess all that's left is to try finding a multimeter and seeing
> > if
> > /WP is being held low somehow. Also, do you have an external programmer
> > such as a Bus Pirate?
>
> I now have a Bus Pirate. I also have a multimeter. What is the best way to
> check if /WP is being held low?
>
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