The ultra-low-power STM32L151xD and STM32L152xD 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 384 Kbytes and RAM up to 48 Kbytes), a flexible static memory controller (FSMC) interface (for devices with packages of 100 pins and more) and an extensive range of enhanced I/Os and peripherals connected to two APB buses.
The STM32L151xD and STM32L152xD devices offer three 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 STM32L151xD and STM32L152xD devices contain standard and advanced communication interfaces: up to two I2Cs, three SPIs, two I2S, one SDIO, three USARTs, two UARTs, and an USB. The STM32L151xD and STM32L152xD devices offer up to 34 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 STM32L151xD 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 STM32L151xD and STM32L152xD 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
305 nA Standby mode (3 wakeup pins)
1.15 μA Standby mode + RTC
0.475 μA Stop mode (16 wakeup lines)
1.35 μA Stop mode + RTC
11 μA Low-power run mode
230 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
33.3 DMIPS peak (Dhrystone 2.1)
Memory protection unit
Up to 34 capacitive sensing channels
CRC calculation unit, 96-bit unique ID
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
Serial wire debug, JTAG and trace
Up to 116 fast I/Os (102 I/Os 5V tolerant), all mappable on 16 external interrupt vectors
Memories
384 Kbytes of Flash memory with ECC (with 2 banks of 192 Kbytes enabling Rww capability)
48 Kbytes of RAM
12 Kbytes of true EEPROM with ECC
128-byte backup register
Memory interface controller supporting SRAM, PSRAM and NOR Flash
LCD driver (except STM32L151xD devices) up to 8x40 segments, contrast adjustment, blinking mode, step-up converter
Rich analog peripherals (down to 1.8V)
3x operational amplifiers
12-bit ADC 1 Msps up to 40 channels
12-bit DAC 2 ch with output buffers
2x ultra-low-power-comparators(window mode and wakeup capability)
DMA controller 12x channels
12x peripheral communication interfaces
1x USB 2.0 (internal 48 MHz PLL)
5x USARTs
Up to 8x SPIs (2x I2S, 3x 16 Mbit/s)
2x I2Cs (SMBus/PMBus)
1x SDIO interface
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)
