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