STMicroelectronics STM32L031C4T6, 32bit ARM Cortex M0+ Microcontroller, STM32L0, 32MHz, 16 kB Flash, 48-Pin LQFP

Ultra-low-power platform
1.65 V to 3.6 V power supply
-40 to 125 °C temperature range
0.25 μA Standby mode (2 wakeup pins)
0.38 μA Stop mode (16 wakeup lines)
0.68 μA Stop mode + RTC + 8 KB RAM retention
Down to 76 μA/MHz in Run mode
5 μs wakeup time (from Flash memory)
41 μA 12-bit ADC conversion (at 10ksps)
Core: ARM® 32-bit Cortex®-M0+
From 32 kHz up to 32 MHz max.
0.95 DMIPS/MHz
Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds
Ultralow power POR/PDR
Programmable voltage detector (PVD)
Clock sources
1 to 25 MHz crystal oscillator
32 kHz oscillator for RTC with calibration
High speed internal 16 MHz factory-trimmed RC (+/- 1%)
Internal low-power 37 kHz RC
Internal multispeed low-power 65 kHz to 4.2 MHz RC
PLL for CPU clock
Pre-programmed bootloader
USART, SPI supported
Development support
Serial wire debug supported
Up to 38 fast I/Os (31 I/Os 5V tolerant)
Memories
Up to 32 KB Flash with ECC
8 KB RAM
1 KB of data EEPROM with ECC
20-byte backup register
Sector protection against R/W operation
Rich Analogue peripherals
12-bit ADC 1.14 Msps up to 10 channels (down to 1.65 V)
2x ultra-low-power comparators (window mode and wake up capability, down to 1.8 V)
7-channel DMA controller, supporting ADC, SPI, I2C, USART, Timers
5x peripherals communication interface
1x USART (IrDA), 1x UART (low power)
1x SPI 16 Mbits/s
1x I2C (SMBus/PMBus)
8x timers: 1x 16-bit with up to 4 channels, 2x 16-bit with up to 2 channels, 1x 16-bit ultra-low-power timer, 1x SysTick, 1x RTC and 2x watchdogs (independent/window)
CRC calculation unit, 96-bit unique ID