CH32V203C8T6 (RISC-V "compatible" MCU)

[Just4Fun]

I couldn't resist...

I've just ordered a lot of 10 MCU CH32V203C8T6 for $13.3 including taxes and shipment (at least to my country).
They are made by WCH and it seem they are pin-compatible with the equivalent STM32 family (of course there is a RISC-V CPU inside, and not an ARM)

See here on the WCH site.

I "discovered" them while searching other things on Aliexpress (it seem that WCH has his official store there).

Very curious to try it out...

[ag123]

it seemed quite similar to W801
viewtopic.php?f=15&t=1715
https://www.hlktech.com/en/Goods-198.html#datum

I'm seeing a list price of about usd 1.90-$2-higher i'm not too sure about shipping
https://www.aliexpress.com/item/1005003642384575.html
https://www.aliexpress.com/item/1005003731136667.html
https://www.aliexpress.com/item/1005003456975478.html
https://www.aliexpress.com/wholesale?ca ... hText=W801

according to this web
https://www.hlktech.com/en/Goods-198.html#datum
it seemed the advertised flash is 1M and sram is 288 kB
some of the aliX has ads like:
Built-in 2MB Flash&288KB RAM

My guess is that most of it is intended for the WiFi firmware as like esp8266, esp32 etc.

oh at least for one thing CH32V203
http://www.wch-ic.com/products/CH32V203.html
At least they bothered to provide an english page, english specs and ref manual. This is kind of 'basic' these days if they intend to sell to customers outside of mainland china.
oh there is one more thing as seen in the specs, they threw in an ETH MAC and BLE 5.3
and interestingly dual usb
i chanced one that has the RJ45 connector here
https://www.aliexpress.com/item/1005004350410929.html

and it is as if the fad doesn't end there, there is (yet) another Risc V chip
CH582M
https://www.aliexpress.com/item/1005004587076215.html
with its own github repository
https://github.com/openwch/ch583

[Just4Fun]

ag123 you are a very bad boy...

You made me buy a W801 board and five W806 MCU too...

Here the link where I bought the CH32V203C8T6 (10x @ $13.3 from the WCH store).

The W801/806 seems really a beast... like compare M3 and M7, but with a C-SKY architecture inside.

Now the problem (at usual) is find the time to play with all these new toys too...

[ag123]

well, that's really quite "cheap", oops oh, but that's just the chip

[dannyf]

C-SKY

I think so long as you code in a high level language like c, architecture is almost transparent to you.

I often couldn't care less about my chips architecture.

[dannyf]

Does this ch32v chip have peripherals similar to the stn32's? That would be a plus.

[dannyf]

it seemed quite similar to W801

yeah - seemed like you sourced the same peripherals from the same vendor(s).

maybe I can look at CH32V's datasheet to code W801

[dannyf]

seemed like you sourced the same peripherals from the same vendor(s).

fat chance

I looked at the wrong link. the peripherals are certainly quite different. maybe functionally close.

[Just4Fun]

It seems it has 2 USB I/F, and one is USB HOST