Entry-level 32-bit MCU for cost-sensitive control
The STM32F030C8T6: The Cortex-M0 core is the smallest ARM processor, designed for low gate count and low power. At 48 MHz it handles most 8- or 16-bit migration tasks without the code-size bloat of a 32-bit RISC that isn't Thumb-2 aware.
Memory and peripheral budget for production firmware
64 KB of Flash (64K x 8) and 8 KB of SRAM (8K x 8) set the firmware and data budget. For a typical motor-control or sensor-node application, that Flash holds the application code plus a modest bootloader; the RAM covers stack, interrupt vectors, and a few hundred bytes of working variables. On-chip peripherals include DMA, POR, PWM, and WDT — the basics for autonomous operation without external supervisor ICs. The 12-channel 12-bit ADC (A/D 12x12b) is adequate for reading potentiometers, current shunts, or thermistors at moderate sample rates.
48-LQFP (7x7 mm) with 39 usable I/O. Surface-mount only.
This part is a mainstream STM32F0 line item, widely second-sourced through distribution and independent channels.