Description
The ultra-low-power STM32L151xC and STM32L152xC devices incorporate the connectivity power of the universal serial bus (USB) with the high-performance ARM® Cortex®-M3 32-bit RISC core operating at a frequency of 32 MHz (33.3 DMIPS), a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 256 Kbytes and RAM up to 32 Kbytes) and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

Features
• Ultra-low-power platform
   – 1.65 V to 3.6 V power supply
   – -40 °C to 105 °C temperature range
   – 0.29µA Standby mode (3 wakeup pins)
   – 1.15 µA Standby mode + RTC
   – 0.44 µA Stop mode (16 wakeup lines)
   – 1.4 µA Stop mode + RTC
   – 8.6 µA Low-power run mode
   – 185 µA/MHz Run mode
   – 10 nA ultra-low I/O leakage
   – 8 µs wakeup time
• Core: ARM® Cortex®-M3 32-bit CPU
   – From 32 kHz up to 32 MHz max
   – 1.25 DMIPS/MHz (Dhrystone 2.1)
   – Memory protection unit
• Reset and supply management
   – Low-power, ultrasafe BOR (brownout reset) with 5 selectable thresholds
   – Ultra-low-power POR/PDR
   – Programmable voltage detector (PVD)
• Clock sources
   – 1 to 24 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 PLL for CPU clock and USB (48 MHz)
• Pre-programmed bootloader
   – USB and USART supported
• Development support
   – Serial wire debug supported
   – JTAG and trace supported
• Up to 83 fast I/Os (70 I/Os 5V tolerant), all mappable on 16 external interrupt vectors
• Memories
   – 256 Kbytes of Flash memory with ECC
   – 32 Kbytes of RAM
   – 8 Kbytes of true EEPROM with ECC
   – 128-byte backup register
• LCD Driver (except STM32L151xC devices) up to 8x40 segments, contrast adjustment, blinking mode, step-up converter
• Rich analog peripherals (down to 1.8 V)
   – 2x operational amplifiers
   – 12-bit ADC 1Msps up to 25 channels
   – 12-bit DAC 2 channels with output buffers
   – 2x ultra-low-power-comparators (window mode and wake up capability)
• DMA controller 12x channels
• 9x peripheral communication interfaces
   – 1x USB 2.0 (internal 48 MHz PLL)
   – 3x USARTs
   – Up to 8x SPIs (2x I2S, 3x 16 Mbit/s)
   – 2x I2Cs (SMBus/PMBus)
• 11x timers: 1x 32-bit, 6x 16-bit with up to 4 IC/OC/PWM channels, 2x 16-bit basic timers, 2x watchdog timers (independent and window)
• Up to 23 capacitive sensing channels
• CRC calculation unit, 96-bit unique ID