LENOVO Ideapad gamin

[the Benninger]

it doesn't have any problem, but the bios programmer won't let me read this chip (it reads on the 'winbound 74M12JWSIG' capsule marked on the MoBo as UC2, it's 128mb , the programmer is XGCU T48 (TL866-3G) version 00.01.31

I try to use the auto detect and it doesn't work, I manually search for the chip and it is not supported, does anyone have an idea, I am doing regular bacups of the machines that pass through my hands, in case I need it in the future as well as being able to help here in the forum



If someone has an idea and wants to express it, I'm welcome

[mon2]

After a quick review - this part may not be supported without a NDA document is in place with Winbond. The reason being that this particular flash device has assorted security features. Respectively, these features must be supported by the manufacturer. The contents inside of the original device are OTP type and they are most likely protected.

See here:

W74M12JW - Authentication Flash - Code Storage Flash Memory - Winbond

[the Benninger]

thanks so m, at the moment we can't do anything then, what I don't understand is the following, being OTP, it should theoretically let us read the info, only if it is true the security implementation is very secure that it encrypts the information in addition to some other things like read protection ect

I'm so grateful to you

[mon2]

I have not explored such devices in depth but know enough information to know that security devices like this one will require a serious vetting process before the vendor will release more information on how to work with the security features. I recall a similar case when we were exploring an encryption device from Maxim Semiconductor a few years ago and our company had to go through many layers of security checks to receive more than a data brief. We supply our products to the aerospace / medical and many other tier 1 companies so have such approvals already but the vendor demanded full details including passport scans, home address, etc. and only then did they provide us with more details on their semiconductors.

Suggest contacting XGCU to check on their position on the support of this device. I think you and they will be firewalled. Such devices are using OTP regions where the data is written to one-time and then it is secured. This region of data, under normal methods, cannot be read back. The device would not be considered to be secure if the data was able to be read back for 'cloning', etc.

On a similar case, we are studying the EMMC storage device that is found on many Hisense TVs. The factory loads the TV up with many apps which keep wearing out the EMMC. After a period of time, the EMMC acts like RAM and is no longer able to retain the proper contents of the operating system. The TV is now useless. Countless threads on reddit and other websites discussing this serious flaw. The EMMC device also has secret OTP regions to hold HDMI authentication keys. Only the factory knows these secret keys used to authenticate the connected HDMI devices. Purchasing a fresh EMMC to replace the worn out one is useless since the keys are missing. Either way, XGCU and other programming tools can read / write limited regions of such EMMC devices and suspecting that your flash device is also sacred and will be protected. I know that Windows 11 demands some secret handshakes with the logic board to operate. Perhaps related to this requirement. Maybe you can replace the part (if it is damaged) from a donor board?

[SMDFlea]

thanks so m, at the moment we can't do anything then, what I don't understand is the following, being OTP, it should theoretically let us read the info, only if it is true the security implementation is very secure that it encrypts the information in addition to some other things like read protection ect

I'm so grateful to you

Read the chip as W25Q128JW