STM32L011D4P6仅仅14个引脚，本评估板有2颗用户LED，1个用户按键，1个复位按键，引出全部IO，板载TI开关电源芯片tps563200，输入电压范围4.5V——17V，设计输出电压5V，最大输出电流3A，另外板载TI电平转换芯片TXB0104，以拓展4个5VGPIO。可用于驱动5V逻辑器件，例如RGB5050 WS2812B。 以下是STM32L011D4P6的官网介绍: The access line ultra-low-power STM32L011xx family incorporates the high-performance ARM:registered: Cortex:registered:-M0+ 32-bit RISC core operating at a 32 MHz frequency, high-speed embedded memories (up to 16 Kbytes of Flash program memory, 512 bytes of data EEPROM and 2 Kbytes of RAM) plus an extensive range of enhanced I/Os and peripherals. The STM32L011xx 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 STM32L011xx devices offer several analog features, one 12-bit ADC with hardware oversampling, two ultra-low-power comparators, several timers, one low-power timer (LPTIM), three general-purpose 16-bit timers, 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 STM32L011xx devices embed standard and advanced communication interfaces: one I2C, one SPI, one USART, and a low-power UART (LPUART). The STM32L011xx also include a real-time clock and a set of backup registers that remain powered in Standby mode. The ultra-low-power STM32L011xx 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. Key Features Ultra-low-power platform1.65 V to 3.6 V power supply -40 to 125 °C temperature range 0.23 μA Standby mode (2 wakeup pins) 0.29 μA Stop mode (16 wakeup lines) 0.54 μA Stop mode + RTC + 2 KB RAM retention Down to 76 μA/MHz in Run m