STMicroelectronics STM32L0 series, ARM® Cortex®-M0+ 32-bit MCU, 32MHz, 16KB Flash, 2K x 8 SRAM, 512 x 8 EEPROM, 1.65V-3.6V, -40°C to 85°C, 28-UFQFPN (4x4), 24 I/O.
| Parameter | Value |
|---|---|
| Series | STM32L0 |
| Mounting type | 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 | 2K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 512 x 8 |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | I²C, IrDA, SPI, UART/USART |
| Number of i (O) | 24 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 28-UFQFN |
| Data converters | A/D 10x12b |
| Program memory size | 16KB (16K x 8) |
The STM32L021G4U6: 16 KB Flash, 2 KB SRAM, and 512 bytes EEPROM on-chip.
24 I/O lines in a 28-UFQFPN (4x4 mm) package. 10-channel 12-bit ADC on board.
STMicroelectronics lists the STM32L021G4U6 as Active.
Yes. The ARM Cortex-M0+ core is supported by all major ARM toolchains — Keil MDK, IAR EWARM, GCC (ARM Embedded), and STM32CubeIDE. Programming and debug use the standard SWD interface.
The listed maximum speed is 32 MHz. This is the core clock ceiling; the PLL and flash wait states must be configured correctly when approaching it.