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Description

The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices incorporate the connectivity power of the universal serial bus (USB) with the high-performance ARM? Cortex?-M3 32-bit RISC core operating at 32 MHz frequency (33.3 DMIPS), a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 128 Kbytes and RAM up to 16 Kbytes) and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

All the devices offer a 12-bit ADC, 2 DACs and 2 ultra-low-power comparators, six general purpose 16-bit timers and two basic timers, which can be used as time bases.

Moreover, the STM32L151x6/8/B and STM32L152x6/8/B devices contain standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs and a USB. The STM32L151x6/8/B and STM32L152x6/8/B devices offer up to 20 capacitive sensing channels to simply add 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 STM32L151x6/8/B devices) has a built-in LCD voltage generator that allows to drive up to 8 multiplexed LCDs with contrast independent of the supply voltage.

The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B 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. It is available in the -40 to +85 °C temperature range, extended to 105°C in low power dissipation state. A comprehensive set of power-saving modes allows the design of low-power applications.

Features

? Ultra-low-power platform

– 1.65 V to 3.6 V power supply

– -40°C to 85°C/105°C temperature range

– 0.3 μA Standby mode (3 wakeup pins)

– 0.9 μA Standby mode + RTC

– 0.57 μA Stop mode (16 wakeup lines)

– 1.2 μA Stop mode + RTC

– 9 μA Low-power run mode

– 214 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

– Ultra-safe, low-power 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

– USART supported

? Development support

– Serial wire debug supported

– JTAG and trace supported

? Up to 83 fast I/Os (73 I/Os 5V tolerant), all mappable on 16 external interrupt vectors

? Memories

– Up to 128 Kbytes Flash memory with ECC

– Up to 16 Kbytes RAM

– Up to 4 Kbytes of true EEPROM with ECC

– 80-byte backup register

? LCD Driver (except STM32L151x/6/8/B devices) for up to 8x40 segments

– Support contrast adjustment

– Support blinking mode

– Step-up converter on board

? Rich analog peripherals (down to 1.8 V)

– 12-bit ADC 1 Msps up to 24 channels

– 12-bit DAC 2 channels with output buffers

– 2x ultra-low-power-comparators (window mode and wake up capability)

? DMA controller 7x channels

? 8x peripheral communication interfaces

– 1x USB 2.0 (internal 48 MHz PLL)

– 3x USARTs (ISO 7816, IrDA)

– 2x SPIs 16 Mbit/s

– 2x I2Cs (SMBus/PMBus)

? 10x timers: 6x 16-bit with up to 4 IC/OC/PWM channels, 2x 16-bit basic timers, 2x watchdog timers (independent and window)

? Up to 20 capacitive sensing channels supporting touchkey, linear and rotary touch sensors

? CRC calculation unit, 96-bit unique ID