need help how to programming winband ic id 74m12jw

[zmezm1995`]

need help how to programming winband ic id 74m12jw

[mon2]

Re: need help how to programming winband ic id 74m12jw

Can you post a clear pic of this part?

Unable to locate this part from Winbond.

[zmezm1995`]

Re: need help how to programming winband ic id 74m12jw

Can you post a clear pic of this part?

Unable to locate this part from Winbond.

this plz help

[mon2]

Re: need help how to programming winband ic id 74m12jw

Hmm..house marked ??

From which computer / laptop / logic board ? Can you post more details ?

[SMDFlea]

Re: need help how to programming winband ic id 74m12jw

need help how to programming winband ic id 74m12jw

Do you have a programmer, if so what model is it ?

[zmezm1995`]

Re: need help how to programming winband ic id 74m12jw

Do you have a programmer, if so what model is it ?

yes i have rt809h

[R_J]

Re: need help how to programming winband ic id 74m12jw

Is this of any help?

[mon2]

Re: need help how to programming winband ic id 74m12jw

Thanks @R_J. Never knew this line of parts even existed from Winbond, till now.

[reformatt]

Re: need help how to programming winband ic id 74m12jw

What kind of device is using this currently? Seems to be challenge/response SPI flash and would prevent copying and unauthorised updating. No data sheets so difficult to know.

[R_J]

Re: need help how to programming winband ic id 74m12jw

I also found this: https://forum.reveltronics.com/viewtopic.php?t=972

All W74xx can be programmed as standard 25 series SPI FLASH devices. It has even the same chip IDs as W25xx. The difference is in authentication layer. W74M stores up to 4x SHA-256 keys for authentication procedure. What's important - keys are not used for encryption. Keys are one-time programmable - once programmed, it can not be changed. It's usually used for anti-clonning protection.