crypticcelery 🔙 EH23#AskFedi: If I was looking for a very small microcontroller (think like less than 5x5 mm), I would guess there are things that exist, right? Any pointers / suggestions?
Rue Mohr@crypticcelery 1 I/O or more?
@RueNahcMohr Ideally a couple, if possible (not sure what is reasonable in this footprint).
ozeng@crypticcelery @RueNahcMohr digikey/mouser let you filter by footprint, maybe even size
you're all idiots@crypticcelery I use the STM32C011 when I need small. It's 3×3 mm in the 20 pin QFN package. Bit low on memory, 32k flash isn't enormous when writing ARM C++ code, 6k RAM. 15 general purpose I/Os if you keep the reset and SWD pins.
https://www.st.com/en/microcontrollers-microprocessors/stm32c0-series/products.html
Keenan Tims@crypticcelery QFN20 is 3x3mm, QFN28 is 4x4mm. You should be able to find plenty of options using one of those packages. Do you have any other constraints?
CH32V203F8U6 is interesting. Cheap (< $1), 144MHz, 64K flash / 20K RAM in 3x3mm QFN20.