ST STM32L0 series, ARM Cortex-M0+, 32-Bit Single-Core, 32MHz, 64KB (64K x 8) FLASH, 8K x 8 RAM, 2K x 8 EEPROM, 64-TFBGA, -40°C~85°C (TA), 1.65V~3.6V.
| Parameter | Value |
|---|---|
| Series | STM32L0 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.65V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 32MHz |
| Package | Tray |
| RAM size | 8K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 2K x 8 |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT |
| Connectivity | I²C, IrDA, SPI, UART/USART |
| Number of i (O) | 51 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 64-TFBGA |
| Data converters | A/D 16x12b |
| Program memory size | 64KB (64K x 8) |
The ST STM32L051R8H6 is a 32-bit ARM Cortex-M0+ MCU from the STM32L0 ultra-low-power line, clocked at 32 MHz. It packs 64 KB of Flash, 8 KB of SRAM, and 2 KB of EEPROM on a single die — enough for a sensor hub, a simple HMI back-end, or a battery-powered data logger that wakes, samples, and sleeps.
At 32 MHz the Cortex-M0+ handles 16-bit PID loops and Modbus RTU framing. The 64 KB Flash holds a FreeRTOS kernel and peripheral drivers.
It comes in a 64-TFBGA package (5x5 mm body, 0.5 mm ball pitch). The pinout follows the STM32L0 standard mapping for the 64-ball TFBGA variant — I/O, power, and ground assignments are shared with the STM32L052R8H6 and other 64-pin L0 siblings.
Yes — both parts share the same 64-TFBGA footprint and pin assignment. The STM32L052 adds a USB 2.0 full-speed peripheral and a few extra analog features, but the pinout is identical, making it a drop-in upgrade path if the application needs USB connectivity.
ST's STM32CubeIDE, Keil MDK, and IAR EWARM all support the Cortex-M0+ core. Programming is done via the standard SWD/JTAG interface; ST-Link/V2 or any ARM-compatible debug probe works. The STM32CubeL0 HAL and LL drivers cover this exact part number.
The rated operating temperature range is -40 to 85 °C (industrial grade). For applications requiring 105 °C or 125 °C operation, look at the STM32L0 automotive-grade variants or the STM32L4 series.