STMicroelectronics STM32F031K6U6TR, ARM Cortex-M0 32-bit MCU, 48 MHz, 32 KB Flash, 4K x 8 SRAM, 27 I/O, 2 V to 3.6 V supply, -40°C to 85°C, 32-UFQFPN (5x5 mm).
| Parameter | Value |
|---|---|
| Series | STM32F0 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 2V ~ 3.6V |
| Operating temperature | -40°C ~ 85°C (TA) |
| Speed | 48MHz |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| RAM size | 4K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | DMA, I²S, POR, PWM, WDT |
| Connectivity | I²C, IrDA, LINbus, SPI, UART/USART |
| Number of i (O) | 27 |
| Core processor | ARM® Cortex®-M0 |
| Case | 32-UFQFN Exposed Pad |
| Data converters | A/D 13x12b |
| Program memory size | 32KB (32K x 8) |
The 48 MHz core clock is the ceiling for this entry-level ARM Cortex-M0. It handles timer-based PWM generation up to the MHz range, UART baud rates beyond 1 Mbps, and SPI clocking fast enough to drive a small TFT display or external ADC.
The 32-UFQFN package with exposed pad (5x5 mm) is a space-saver but needs careful PCB layout. The 0.5 mm pitch calls for a fine-pitch stencil and good solder-paste registration.
The STM32F031K6U6TR and STM32F031K4 share the same base product number STM32F031 and the same 32-UFQFN package, so they are pin-compatible. The K6 variant has 32 KB Flash versus the K4's 16 KB, making it a drop-in upgrade for designs needing more code space.