Features

• Ultra-low-power platform

– 1.8 V to 3.6 V power supply

– –40 to 85 °C temperature range

– 0.29 μA Standby mode (2 wakeup pins)

– 0.43 μA Stop mode (16 wakeup lines)

– 0.86 μA Stop mode + RTC + 20-Kbyte RAM

retention

– Down to 93 μA/MHz in Run mode

– 5 μs wakeup time (from Flash memory)

– 41 μA 12-bit ADC conversion at 10 ksps

• Core: Arm® 32-bit Cortex®-M0+

– From 32 kHz to 32 MHz

– 0.95 DMIPS/MHz

• Reset and supply management

– Ultra-low-power BOR (brownout reset) with

5 selectable thresholds

– Ultra-low-power POR/PDR

• Clock sources

– 0 to 32 MHz external clock

– 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, I2C, SPI supported

• Development support

– Serial wire debug supported

• 51 fast I/Os (45 I/Os 5-Volt tolerant)

• Memories

– 128-Kbyte Flash memory

– 20-Kbyte RAM

– 512 bytes of data EEPROM

– 20-byte backup register

– Sector protection against R/W operation

• Analog peripherals

– 12-bit ADC 1.14 Msps up to 16 channels (down

to 1.8 V)

• 7-channel DMA controller, supporting ADC, SPI,

I2C, USART and timers

• 4x peripherals communication interface

• 1x USART (ISO7816), 1x LPUART (low power)

• 1x SPI 16 Mbit/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-lowpower

timer, 1x SysTick, 1x RTC and 2x watchdogs

(independent/window)

• CRC calculation unit, 96-bit unique ID

• LFQFP64 package is ECOPACK2 compliant