STM32L432KBU6
数据手册.pdf带DSP和FPU的超低功耗32位MCU
The STM32L432xx devices are the ultra-low-power microcontrollers based on the high-performance 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 STM32L432xx devices embed high-speed memories Flash memory up to 256 Kbyte, 64 Kbyte of SRAM, 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 STM32L432xx 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, twoDAC channels, a low-power RTC, one general-purpose 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 3 capacitive sensing channels are available.
They also feature standard and advanced communication interfaces.
**Key Features**
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- Ultra-low-power with FlexPowerControl
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- 1.71 V to 3.6 V power supply
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- -40 °C to 85/105/125 °C temperature range
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- 8 nA Shutdown mode 2 wakeup pins
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- 28 nA Standby mode 2 wakeup pins
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- 280 nA Standby mode with RTC
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- 1.0 μA Stop 2 mode, 1.28 μA with RTC
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- 84 μA/MHz run mode
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- Batch acquisition mode BAM
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- 4 μs wakeup from Stop mode
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- Brown out reset BOR
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- Interconnect matrix
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- 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 and DSP instructions
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- Performance benchmark
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- 1.25 DMIPS/MHz Drystone 2.1
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- 273.55 CoreMark® 3.42 CoreMark/MHz @ 80 MHz
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- Energy benchmark
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- 176.7 ULPBench® score
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- Clock Sources
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- 32 kHz crystal oscillator for RTC LSE
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- Internal 16 MHz factory-trimmed RC ±1%
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- Internal low-power 32 kHz RC ±5%
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- Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE better than ±0.25 % accuracy
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- Internal 48 MHz with clock recovery
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- 2 PLLs for system clock, USB, audio, ADC
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- Up to 26 fast I/Os, most 5 V-tolerant
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- RTC with HW calendar, alarms and calibration
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- Up to 3 capacitive sensing channels
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- 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
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- Memories
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- Up to 256 KB single bank Flash, proprietary code readout protection
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- 64 KB of SRAM including 16 KB with hardware parity check
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- Quad SPI memory interface
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- Rich analog peripherals independent supply
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- 1× 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 μA/Msps
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- 2x 12-bit DAC, low-power sample and hold
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- 1x operational amplifier with built-in PGA
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- 2x ultra-low-power comparators
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- 14x communication interfaces
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- USB 2.0 full-speed crystal less solution with LPM and BCD
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- 1x SAI serial audio interface
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- 2x I2C FM+1 Mbit/s, SMBus/PMBus
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- 3x USARTs ISO 7816, LIN, IrDA, modem
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- 1x LPUART Stop2 wake-up
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- 2x SPIs 3x SPIs with the Quad SPI
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- CAN 2.0B Active
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- SWPMI single wire protocol master I/F
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- IRTIM Infrared interface
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- 14-channel DMA controller
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- True random number generator
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- CRC calculation unit, 96-bit unique ID