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.
The STM32L151xC and STM32L152xC devices offer two operational amplifiers, one 12-bit ADC, two DACs, two ultra-low-power comparators, one general-purpose 32-bit timer, six general-purpose 16-bit timers and two basic timers, which can be used as time bases.
Moreover, the STM32L151xC and STM32L152xC devices contain standard and advanced communication interfaces: up to two I2Cs, three SPIs, two I2S, three USARTs and an USB. The STM32L151xC and STM32L152xC devices offer up to 23 capacitive sensing channels to simply add a touch sensing functionality to any application.
They also include a real-time clock and a set of backup registers that remain powered in Standby mode.
Finally, the integrated LCD controller (except STM32L151xC devices) has a built-in LCD voltage generator that allows to drive up to 8 multiplexed LCDs with the contrast independent of the supply voltage.
The ultra-low-power STM32L151xC and STM32L152xC devices operate from a 1.8 to 3.6 V power supply (down to 1.65 V at power down) with BOR and from a 1.65 to 3.6 V power supply without BOR option. They are available in the -40 to +85 °C and -40 to +105 °C temperature ranges. A comprehensive set of power-saving modes allows the design of low-power applications.
**Key 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)
