Hi Nico,

No, I dont have it...Didnt know that chip is 1.8v. ch341a support is 3.3-5v. I must find voltage contorler. 

Thaks, I will replay is that help :-)


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On Mon, Aug 29, 2022 at 16:14, Nico Huber
<nico.h@gmx.de> wrote:
Hi Delevic,

On 28.08.22 22:56, Delevic via flashrom wrote:
> Found Winbond flash chip "W25Q40EW" (512 kB, SPI) on ch341a_spi.

note this is a 1.8V chip and that might be the cause of your problems.
If you don't have a voltage adapter between your CH341A and the flash
chip, a safety circuit in the flash will trigger and prevent erasing
(as that would damage the chip at higher voltage).

If you already have a voltage adapter, it might be a write-protection.
Make sure that all the input pins have a defined state and that the
/WP pin is at a high level.

Hope that helps,