Discussion:
[flashrom] flash bios on winbond W25X32
LWS
2018-09-10 19:06:35 UTC
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Hi,
I am a newbie, so please be patient.
I want flash my bios because I have a suspect of an internal rootkit.
I have found the following link
https://tomvanveen.eu/flashing-bios-chip-raspberry-pi/
where it looks pretty easy to flash the chip by raspberry.
I have a pomona 5250 clip and my problem is connect the clip to the exact
pins on the W25X32 chip (from raspberry).
I have downloaded the datasheet here:
http://pdf1.alldatasheet.com/datasheet-pdf/view/207471/WINBOND/W25X32/+Q07W8_VThMwPPh+bYweww+/datasheet.pdf
In the above link (https://tomvanveen.eu/flashing-bios-chip-raspberry-pi/)
there is the schema to connect the wires.. but what I don't understand is
if the raspberry pin 17 must be connected to 3 pins on the chip.. On the
schema there is written:

(raspberry) 17 ---> (w25x32) VCC 3.3V and /HOLD and /WP

Then do I have to connect the pin 17 to vcc and /hold and /wp ????
I ask this because seeing the photos it looks connected to just one pin.
Thank you very much.
LWS
Angel Pons
2018-09-10 21:30:26 UTC
Permalink
Hello LWS,

I use a RPi for flashing chips too, and I connect pin 17 (3.3V source for
the RPi) to three pins on DIP-8/SOIC-8 flash chip:

- pin 3, to disable write protection
- pin 7, to enable the chip
- pin 8, to power the chip

As I understand it, it should work.

Best regards,

Angel Pons

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