Features
Includes ST state-of-the-art patented
technology
• Ultra-low-power platform
– 1.65 V to 3.6 V power supply
– -40 to 125 °C temperature range
– 0.29 μA Standby mode (3 wakeup pins)
– 0.43 μA Stop mode (16 wakeup lines)
– 0.86 μA Stop mode + RTC + 20-Kbyte
RAM retention
– Down to 93 μA/MHz in Run mode
– 5 μs wakeup time (from Flash memory)
– 41 μA 12-bit ADC conversion at 10 ksps
• Core: Arm® 32-bit Cortex®-M0+ with MPU
– From 32 kHz up to 32 MHz max.
– 0.95 DMIPS/MHz
• Memories
– Up to 192-Kbyte Flash memory with ECC
(2 banks with read-while-write capability)
– 20-Kbyte RAM
– 6 Kbytes of data EEPROM with ECC
– 20-byte backup register
– Sector protection against R/W operation
• Up to 40 fast I/Os (34 I/Os 5V tolerant)
• 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 25 MHz crystal oscillator
– 32 kHz oscillator for RTC with calibration
– High speed internal 16 MHz factorytrimmed
RC (+/- 1%)
– Internal low-power 37 kHz RC
– Internal multispeed low-power 65 kHz to
4.2 MHz RC
– Internal self calibration of 48 MHz RC for
USB
– PLL for CPU clock
• Pre-programmed bootloader
– USB, USART supported
• Development support
– Serial wire debug supported
• Rich Analog peripherals
– 12-bit ADC 1.14 Msps, up to 13 channels
(down to 1.65 V)
– 2 x 12-bit channel DACs with output buffers
(down to 1.8 V)
– 2x ultra-low-power comparators (window
mode and wake up capability, down to
1.65 V)
• Up to 19 capacitive sensing channels
supporting touchkey, linear and rotary touch
sensors
• 7-channel DMA controller, supporting ADC,
SPI, I2C, USART, DAC, Timers, AES
• 11x peripheral communication interfaces
– 1x USB 2.0 crystal-less, battery charging
detection and LPM
– 4x USART (2 with ISO 7816, IrDA), 1x
UART (low power)
– Up to 6x SPI 16 Mbits/s
– 3x I2C (2 with SMBus/PMBus)
• 11x timers: 2x 16-bit with up to 4 channels, 2x
16-bit with up to 2 channels, 1x 16-bit ultra-lowpower
timer, 1x SysTick, 1x RTC, 2x 16-bit
basic for DAC, and 2x watchdogs
(independent/window)
• CRC calculation unit, 96-bit unique ID
• True RNG and firewall protection
• Hardware Encryption Engine AES 128-bit
• All packages are ECOPACK2

Description
The ultra-low-power STM32L082xx microcontrollers incorporate the connectivity power of
the universal serial bus (USB 2.0 crystal-less) with the high-performance Arm Cortex-M0+
32-bit RISC core operating at a 32 MHz frequency, a memory protection unit (MPU), highspeed
embedded memories (up to 192 Kbytes of Flash program memory, 6 Kbytes of data
EEPROM and 20 Kbytes of RAM) plus an extensive range of enhanced I/Os and
peripherals.
The STM32L082xx devices provide high power efficiency for a wide range of performance.
It is achieved with a large choice of internal and external clock sources, an internal voltage
adaptation and several low-power modes.
The STM32L082xx devices offer several analog features, one 12-bit ADC with hardware
oversampling, two DACs, two ultra-low-power comparators, AES, several timers, one lowpower
timer (LPTIM), four general-purpose 16-bit timers and two basic timer, one RTC and
one SysTick which can be used as timebases. They also feature two watchdogs, one
watchdog with independent clock and window capability and one window watchdog based
on bus clock.
Moreover, the STM32L082xx devices embed standard and advanced communication
interfaces: up to three I2Cs, two SPIs, one I2S, four USARTs, a low-power UART
(LPUART), and a crystal-less USB. The devices offer up to 19 capacitive sensing channels
to simply add touch sensing functionality to any application.
The STM32L082xx also include a real-time clock and a set of backup registers that remain
powered in Standby mode.
The ultra-low-power STM32L082xx 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 +125 °C temperature range. A comprehensive set of
power-saving modes allows the design of low-power applications.