72 MHz Cortex-M3 with 128 KB flash — what the memory split means for your firmware
The STM32F103CBU6TR: For a typical motor-control or CAN-gateway application, the flash holds the application code plus a small RTOS kernel; the 20 KB SRAM leaves room for a few communication buffers and a modest call stack.
Peripheral set — CAN, USB, and motor-control PWM on one die
Connectivity includes CANbus, USB, I2C, SPI, UART/USART, IrDA, and LINbus. The motor-control PWM timer and DMA controller make this a natural fit for a brushless-DC drive or a servo axis controller. The 10-channel 12-bit ADC samples current-sense or position-feedback signals without an external converter. 37 GPIOs are available in the 48-pin package — enough for a keypad, a small display, and a few encoder inputs.
Package and board-fit — 48-UFQFPN with exposed pad
Surface-mount assembly with the tape-and-reel packaging suits automated pick-and-place lines.
Supply and temperature — single-rail 2-3.6V, industrial range
Operates from a single 2V to 3.6V supply — a 3.3V rail powers the core and I/O without a separate core regulator. ROHS3 compliant.