MCU 32-Bit

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.

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 KB Flash with ECC (with 2 banks of 192 KB enabling Rww capability)

48 KB RAM

12 KB 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 USART

3x SPI 16 Mbits/s (2x SPI with I2S)

2x I2C (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)