The STM32L476QEI6 is an ultra-low-power STM32 L4 series 32-bit Microcontroller based on the high-performance ARM Cortex-M4 RISC core operating at a frequency of up to 80MHz. The Cortex-M4 core features a floating point unit (FPU) single precision which supports all ARM single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security. The device embed high-speed memories (Flash memory up to 512KB, up to 128kB of SRAM), a flexible external memory controller (FSMC) for static memories, a quad SPI flash memories interface and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix. The device embed several protection mechanisms for embedded flash memory and SRAM - readout protection, write protection, proprietary code readout protection and firewall.
● 100 DMIPS/1.25DMIPS/MHz (Dhrystone 2.1)
● 4 to 48MHz Crystal oscillator
● 32kHz Crystal oscillator for RTC (LSE)
● Internal 16MHz factory-trimmed RC (±1%)
● Internal low-power 32kHz RC (±5%)
● Internal multispeed 100kHz to 48MHz oscillator, auto-trimmed by LSE
● 3 PLLs for system clock, USB, audio, ADC
● RTC with HW calendar, alarms and calibration
● LCD controller
● Up to 24 capacitive sensing channels - Support touchkey, linear and rotary touch sensors
● SysTick Timer
● 2 x Watchdog timers
● 4 x Digital filters for sigma delta modulator
● USB OTG 2.0 full speed, LPM and BCD peripheral
● 2 x Serial audio interface
● CAN (2.0B Active) and SDMMC interface
● SWPMI single wire protocol master I/F
● 14-channel DMA Controller
● True random number generator
● CRC calculation unit, 96-bit unique ID
