Hi, welcome to flashprog :) On 5/26/26 19:15, tctl5p9ik7vh--- via Flashprog wrote:

Hello. I have a few questions about reading spi using raspberry pi with flashprog. I've had some problems so far. First I would like to know if the winbond 25q256jvem chip is supported. I see W25Q256JV_M is a supported chip. Does that V_M cover the VEM variant?

Yes, it's supported. The _ is meant to be a placeholder. The E in VEM only signifies the chip package. Internally, they are the same.

Also I would like to know what is the recommended advice for pins 3 (WP/IO2) and 7 (HOLD/IO3)? Should they be spliced into pin 8 or floating when reading a quad speed chip?

It depends on the overall setup. If the chip is soldered to a mainboard for instance, these pins would be connected already. If you have a plain chip connected to your RPi, you should always connect all pins (doesn't matter if it's a quad chip, quad is enabled or not). You can put a resistor between these pins and VCC for safety, something < 100kOhm should work. If the chip is on a mainboard, problems are likely related to the circuitry on the board. Best is to look into documentation for the particular board or its schematics if you can find them. Nico