STMicroelectronics STM32 L0 超低功耗微控制器

意法半导体 STM32 L0 超低功耗微控制器经过优化，可实现出色的低功耗。成为具有突破性性能的、真正的超低功率型微控制器。STM32 L0 独具 ARM® Cortex®-M0+ 核心和 STM32 超低功耗特性，非常适合采用电池或电能采集供电的应用、同时也是世界上 125°C 温度下功耗最低的微控制器。STM32 L0 具有动态电压调节功能、一个超低功率时钟振荡器、LCD 接口、比较器、数模转换器和硬件加密功能。新的自主式外设（包括 USART、I²C、触摸传感控制器）降低了 ARM Cortex-M0+ 内核的负荷，减少了 CPU 唤醒次数，并缩短了处理时间及降低了功耗。其他增值特性，例如 12 位模数转换器、无需外晶振的 USB、从超低功耗模式下快速唤醒及能在超低功耗模式下继续运行的通信外设，实现了系统集成、高性能与超低能耗之间的完美平衡。STM32 L0 具有高达 64KB 的闪存、8KB 的 RAM 及高达 2KB 的嵌入式 EEPROM（无需仿真），采用 32 到 64 引脚封装，包括节省空间的 WLCSP36。

The STM32 L0 offers dynamic voltage scaling, an ultra-low-power clock oscillator, LCD interface, comparator, DAC and hardware encryption. New autonomous peripherals (including USART, I²C, touch sense controller) reduce the load of the ARM Cortex-M0+ core leading to fewer CPU wakeups and contribute to decreased processing time and power consumption.

Other value-added features like 12-bit ADC, crystal-less USB, short wake-up time and communication peripherals capable of operating in ultra-low-power mode make up for an unrivaled tradeoff between feature integration, performance and ultra-low-energy consumption.

The STM32 L0 is available with up to 64Kb of Flash, 8Kbytes of RAM and up to 2Kbytes of embedded EEPROM (no emulation needed) in 32- to 64-pin packages, including a space-saving WLCSP36.

特性

Ultra-low-power platform
- 1.65V to 3.6V power supply
- -40°C to +125°C temperature range
- 0.27μA standby mode (2 wake-up pins)
- 0.4μA stop mode (16 wake-up lines)
- 0.8μA stop mode + RTC + 8KB RAM retention
- 3.5μs wake-up time (from RAM)
- 5μs wake-up time (from Flash memory)
Arm 32-bit Cortex-M0+ with MPU core
- From 32kHz up to 32MHz max
- 0.95 DMIPS/MHz
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
- PLL for CPU clock
Pre-programmed bootloader
- USART and SPI supported
Development support
- Serial wire debug supported
Up to 51 fast I/Os (45 I/Os 5V tolerant)
Memories
- Up to 64KB Flash with ECC
- 8KB RAM
- 2KB of data EEPROM with ECC
- 20-byte backup register
- Sector protection against R/W operation

Rich analog peripherals
- 12-bit ADC 1.14Msps up to 16 channels (down to 1.65V)
- 12-bit 1 channel DAC with output buffers (down to 1.8V)
- 2x ultra-low-power comparators (window mode and wake up capability, down to 1.8V)
Up to 24 capacitive sensing channels supporting touch key, linear and rotary touch sensors
7-channel DMA controller, supporting ADC, SPI, I2C, USART, DAC, Timers
8x peripherals communication interface
1x USB 2.0 crystal-less, battery charging detection, and LPM
2x USART (ISO 7816, IrDA), 1x UART (low power)
2x SPI 16 Mbits/s
2x I2C (SMBus/PMBus)
9x 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
- 1x 16-bit basic for DAC
- 2x watchdogs (independent/window)
CRC calculation unit and 96-bit unique ID
True RNG and firewall protection
All packages are ECOPACK®2