Описание
The STM32L443xx devices are the ultra-low-power microcontrollers based on the highperformance ARM® Cortex®-M4 32-bit RISC core operating at a frequency of up to 80 MHz. 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 STM32L443xx devices embed high-speed memories (256 Kbyte of Flash memory, 64 Kbyte of SRAM), a Quad SPI flash memories interface (available on all packages) 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 STM32L443xx devices embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, proprietary code readout protection and Firewall. The devices offer a fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, two DAC channels, an internal voltage reference buffer, a low-power RTC, one generalpurpose 32-bit timer, one 16-bit PWM timer dedicated to motor control, four general-purpose 16-bit timers, and two 16-bit low-power timers. In addition, up to 21 capacitive sensing channels are available. The devices also embed an integrated LCD driver 8×40 or 4×44, with internal step-up converter.
Ultra-low-power with FlexPowerControl 1.71 V to 3.6 V power supply -40 °C to 85/105/125 °C temperature range 200 nA in VBAT mode: supply for RTC and 32×32-bit backup registers 8 nA Shutdown mode (5 wakeup pins) 28 nA Standby mode (5 wakeup pins) 280 nA Standby mode with RTC 1.0 µA Stop 2 mode, 1.28 µA Stop 2 with RTC 84 µA/MHz run mode Batch acquisition mode (BAM) 4 µs wakeup from Stop mode Brown out reset (BOR) in all modes except shutdown Interconnect matrix Core: ARM® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS/1.25DMIPS/MHz (Dhrystone 2.1), and DSP instructions Performance Benchmark 1.25 DMIPS/MHz (Drystone 2.1) 273.55 Coremark® (3.42 Coremark/MHz @ 80 MHz) Energy Benchmark 176.7 ULPBench® score Clock Sources 4 to 48 MHz crystal oscillator 32 kHz crystal oscillator for RTC (LSE) Internal 16 MHz factory-trimmed RC (±1%) Internal low-power 32 kHz RC (±5%) Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy) Internal 48 MHz with clock recovery 2 PLLs for system clock, USB, audio, ADC RTC with HW calendar, alarms and calibration LCD 8 × 40 or 4 × 44 with step-up converter Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors 11x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 2x 16-bit general purpose, 2x 16- bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer Up to 83 fast I/Os, most 5 V-tolerant Memories 256 KB single bank Flash, proprietary code readout protection 64 KB of SRAM including 16 KB with hardware parity check Quad SPI memory interface Rich analog peripherals (independent supply) 1× 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 µA/Msps 2x 12-bit DAC, low-power sample and hold 1x operational amplifier with built-in PGA 2x ultra-low-power comparators
