The STM32L151QEH6 is an ultra-low-power STM32 L1 series 32-bit Microcontroller incorporates the connectivity power of the universal serial bus (USB) with the high-performance ARM Cortex-M3 RISC core operating at a frequency of 32MHz (33.3 DMIPS). It features a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 512kB and RAM up to 80KB) and an extensive range of enhanced I/Os and peripherals connected to two APB buses. The devices offer two operational amplifiers, one 12-bit ADC, two DACs, two ultra-low-power comparators, one general-purpose 32-bit timer, six general-purpose 16-bit timers and two basic timers, which can be used as time bases. The device contain standard and advanced communication interfaces - two I²Cs, two I²Ss, three SPIs, three USARTs, two UARTs and an USB.
● 1.25 DMIPS/MHz (Dhrystone 2.1)
● Low-power, ultrasafe BOR (brownout reset) with 5 selectable thresholds
● Ultralow-power POR/PDR
● Programmable voltage detector (PVD)
● 1 to 24MHz Crystal oscillator
● 32kHz Oscillator for RTC with calibration
● Internal 16MHz oscillator factory trimmed RC(±1%) with PLL option
● Internal low-power 37kHz Oscillator
● Internal multispeed low-power 65kHz to 4.2MHz Oscillator
● PLL for CPU clock and USB (48MHz)
● Pre-programmed bootloader - USB and USART supported
● DMA Controller 12x channels
● USB 2.0 (internal 48MHz PLL) Interface
● 2 x Watchdog timers (Independent and window)
● Development support - Serial wire debug, JTAG and trace
