48 MHz Cortex-M0 with 256 KB Flash — memory headroom for control loops
The STM32F091VCT6: For a typical motor-control or sensor-fusion application, the 256 KB program space accommodates a full STM32Cube firmware stack plus the application logic without external memory. The 88 general-purpose I/O pins in the 100-LQFP package give the board designer enough headroom to connect parallel displays, keypads, and multiple sensor buses without a port expander.
Peripheral set — CAN, multiple serial interfaces, and 19-channel ADC
The 19-channel 12-bit ADC and dual 12-bit DAC cover analog signal chains without an external converter for most sensor-conditioning tasks. On-chip peripherals include DMA, I²S, POR, PWM, and WDT.
For BOM planning, the base product number STM32F091 covers multiple memory and package variants in the same family. If the 100-LQFP footprint or 256 KB flash is not required, a pin-compatible sibling with less memory or a smaller package may be available — confirm the specific order code against the BOM line.