STM32L031G6U7 Description

The 32-bit, 32 MHz, high-performance Arm? Cortex?-M0+ 32-bit RISC core, high-speed embedded memories (up to 32 Kbytes of Flash program memory, 1 Kbytes of data EEPROM, and 8 Kbytes of RAM), as well as a wide variety of improved I/Os and peripherals, are all included in the access line ultra-low-power STM32L031G6U7.

High power efficiency for a variety of performances is offered by the STM32L031G6U7 chip. This is made possible by a broad selection of internal and external clock sources, a built-in voltage adaption, and numerous low-power modes.

The STM32L031G6U7 device includes a number of analog capabilities, including a 12-bit ADC with hardware oversampling, two comparators that consume very little power, multiple timers, and a low-power timer (LPTIM), three general-purpose 16-bit timers, an RTC, and a SysTick that can serve as a time base. They also have two watchdogs: a window watchdog based on a bus clock and a watchdog with separate clock and window functionality.

The STM32L031G6U7 device also includes one I2C, one SPI, one USART, and a low-power UART among other advanced and conventional communication interfaces (LPUART).

In addition, the STM32L031G6U7 has a real-time clock and a set of backup registers that are powered even when the device is in standby mode.

The STM32L031G6U7 ultra-low-power device can run on a 1.8 to 3.6 V power supply with BOR or a 1.65 to 3.6 V power supply without BOR option (down to 1.65 V at power down). They are offered in the temperature range of -40 to +125 °C. A wide range of power-saving modes makes the development of low-power applications.

STM32L031G6U7 Features

• Rich Analog peripherals

– 12-bit ADC 1.14 Msps up to 10 channels (down to 1.65 V)

– 2x ultra-low-power comparators (window mode and wake up capability, down to 1.65 V)

• 7-channel DMA controller, supporting ADC, SPI, I2C, USART, Timers

• 5x peripherals communication interface

• 1x USART (ISO 7816, IrDA), 1x UART (low power)

• Up to 2 SPI interfaces, up to 16 Mbits/s

• 1x I2C (SMBus/PMBus)

• 8x timers: 1x 16-bit with up to 4 channels, 2x 16-bit with up to 2 channels, 1x 16-bit ultra-low-power timer, 1x SysTick, 1x RTC and 2x watchdogs (independent/window)

• CRC calculation unit, 96-bit unique ID

• All packages are ECOPACK?2

• Ultra-low-power platform

– 1.65 V to 3.6 V power supply

– -40 to 125 °C temperature range

– 0.23 μA Standby mode (2 wakeup pins)

– 0.35 μA Stop mode (16 wakeup lines)

– 0.6 μA Stop mode + RTC + 8 KB RAM retention

– Down to 76 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+

– From 32 kHz up to 32 MHz max.

– 0.95 DMIPS/MHz

• Reset and supply management

– Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds

– Ultralow 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 factory-trimmed RC (+/- 1%)

– Internal low-power 37 kHz RC

– Internal multispeed low-power 65 kHz to 4.2 MHz RC

– PLL for CPU clock

• Pre-programmed bootloader

– USART, SPI supported

• Development support

– Serial wire debug supported

• Up to 38 fast I/Os (31 I/Os 5V tolerant)

• Memories

– Up to 32-Kbyte Flash with ECC

– 8-Kbyte RAM

– 1-Kbyte of data EEPROM with ECC

– 20-byte backup register

– Sector protection against R/W operation

STM32L031G6U7 Applications

• Light sensing & controlling devices

• Temperature sensing and controlling devices

• Fire detection & safety devices

• Industrial instrumentation devices

• Process control devices