Datasheet & Guidance for MX66UW1G45G on STM32N6-DK

[Zaeem-Ahmed]

Dear STMicroelectronics Community / Support Team,

I hope you are doing well.

I am currently working with the STM32N6 Discovery Kit and noticed that it uses an external Octal NOR flash device with the part number MX66UW1G45G. However, I have been unable to locate a public datasheet for this exact component.

I was able to find datasheets for similar parts such as MX66U1G45G and MX66UM1G45G, but not for the “UW” variant used on the board. This has led to some confusion regarding the exact specifications, supported features, and command set of the device.

I would appreciate your guidance on the following points:

1. Is MX66UW1G45G a custom or internal part number used specifically for STM32 evaluation boards?
2. Is there a publicly available datasheet for this device, or can it be shared upon request?
3. Can MX66UM1G45G (or another publicly documented part) be considered a fully compatible equivalent for development purposes?
4. Are there any specific differences (e.g., command set, timing, interface behavior) that I should be aware of when writing low-level drivers?
5. If I plan to use the STM32N6 DK as a prototype and later design my own PCB, that's why I need to very clear about the exact part number, and does it exists publically?

My goal is to develop a reliable driver and potentially use the same (or equivalent) flash memory in a custom hardware design, so having clarity on this component is very important.

Thank you for your time and support. I look forward to your response.

Best regards,
Zaeem Ahmed

[mƎALLEm]

Hi @Zaeem-Ahmed and @beSTMax ,

As already noted previously, we are not the provider of that memory either contact the memory or your local distributor of that memory to get the datasheet. 

Sorry we cannot help you on this request.

[beSTMax]

Hi @mƎALLEm ,

thanks for the heads-up.

It's understandable to contact your local distributor if you're using the parts for a product and have some leverage.

But what is a hobbyist supposed to do? The shops/distributors likely won't answer you, same as Macronix won't answer.

BR