STM32F402 part number, does it exist?

[Niclas Hedhman]

STM32World Rant #2 - MYSTERIOUS UNKNOWN MCU

Just a short rant about the MYSTERIOUS STM32F402. This MCU does NOT exist in ST's catalog, and yet you can readily buy them in China. In this video I will go through the datasheet, find a comparable MCU which exists and compare them.

#STM32 #China #MCU #STM32World

https://www.youtube.com/watch?v=ILUuB6Kaz5U

[STOne-32 · Accepted solution]

Dear @Niclas Hedhman ,

Yes, this MCU we can order it only in China.  The STM32F402 MCU part of the STM32F4 series and is compatible with the STM32F401 MCU existing on our official catalog. The products are fully compatible, allowing the use of the same ecosystem and tools

1) STM32F400 ( parts only in China )  ->  STM32F410 World Wide 

2) STM32F402 ( parts only in China )  -> STM32F401 World Wide 

Regards,

STOne-32.

[Tesla DeLorean]

I recollect it being something to do with licences paid for IP and a lot China vs RoW (Rest of World) price distortions, and associated non-sense of it competing with the usual parts.

Also watched your SDIO video, yeah, that's been a nightmare for a while, been bugs and annoyances in libraries for a decade or more, and general inconsistencies in HAL from one STM32 family to another and keeping the up to date, coherent and correct. Some variants had the 1B / 4B stuff handled within HAL_SDIO_Init()

On the SDMMC eMMC side the interface will also work at up to 8-bit wide, there were some short lived cards with additional pins and staggered connectors, but the sockets / card aren't available any more.

eMMC cards are usable of the F4, but command / initialization sequences a bit different.

At high speeds you want to use DMA, as the card interface is intolerant to distractions