STM32C0 is a new line of Cortex M0+ Microcontrollers this year. Low-end STM32 chips have been trying to dethrone the 8-bit crowd by offering a 32-bit ARM Cortex M0+ for some time, and I welcome this competition. STM32C0 is cost-optimized with 8-pin to 48-pin form factors, and targeting very low end with 6kB SRAM and 48 MHz clock speed.

SPI, UART, I2C, 4+ MHz XTAL and 32kHz XTAL support, multiple timers for PWM, 12-bit ADC with best case 2.5 Megasamples / second.

Not bad for 61-cents (quantity 1k) at Digikey, ehh?

I think the 8-bitters still seem to have more I/O features, but this is a pretty competitive 32-bit chip on the low end. ST-micro is selling this chip as “entry-level 32-bit”, saying that you can keep code-compatibility as you scale up your projects. After all, ARM is ARM, be it a tiny Cortex M0+ or a higher end M33, M4 or M7 chip.

For people hoping to scale designs up and down, adding STM32C0 line chips is probably welcome to the STM32 hobbyists.