STM32L471RET6 LQFP-64 

ARM Cortex-M4 32-bit microcontroller MCU

Product Description

Ultra-low-power with FPU ARM Cortex-M4 MCU 80 MHz with 512 Kbytes Flash, DFSDM

The STM32L471xx devices are the ultra-low-power microcontrolers 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 STM32L471xx devices embed high-speed memories (flash memony up to 1 Mbyte, up to 128 Kbyte of SRAM), a fiexible external memory controller (FSMC) for static memories (for devices with packages of 100 pins and more), a Quad SPl fiash memories interface (available on all packages) and an extensive range of enhanced lOs and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.

The STM32L471xx devices embed several protection mechanisms for embedded Flash memony and SRAM: readout protection, write protection, proprietary code readout protection and Firewall.

The devices offer up to three fast 12-bit ADCs (5 Msps), two comparators, two operational amplifiers, two DAc channels, an internal voltage reference bffuer, a low-power RTC, two general-purpose 32-bit timer, two 16-bit PWM timers dedicated to motor control, seven general-purpose 16-bit timers, and two 16-bit low-power timers. The devices support four digital filters for external siama delta modulators (DFSDM).

In addition, up to 24 capacitive sensing channels are available.

They also feature standard and advanced communication interfaces.

The STM32L471xx operates in the .40 to +85℃ (+105 ℃ junction),- 40 to +105 ℃ (+125 ℃ junction) and - 40 to +125 ℃ (+130 ℃ junction) temperature ranges from a 1.71 to 3.6 V power supply, A comprehensive set of power-saving modes allows the design of low- power applications.

Some independent power supplies are supported: analog independent supply input for ADC, DAC, OPAMPs and comparators, and up to 14 l/Os can be supplied independently down to 1.08 V, A VBAT input allows to backup the RTC and backup registers.

The STM32L471xx family offers four packages from 64-pin to 144-pin packages.

Product features

      Ultra-ow-power with FlexPowerControl

- 1.71 Vto 3.6 V power supply

- -40°C to 85/105/125°C temperature range

- 300 nA in VBAT mode: supply for RTC and 32x32-bit backup registers

- 30 nA Shutdown mode (5 wakeup pins)

- 120 nA Standby mode (5 wakeup pins)

- 420 nA Standby mode with RTC

- 1.1 μA Stop 2 mode, 1.4 μA with RTC

- 100 μAVHz run mode

- Batch acqisition mode (BAM)

- 4 μs wakeup from Stop mode

- Brown out reset(BOR)

- Interconnect matrix

      Core

- Arm® 32-bit Cotex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wail-state execution from Flash memory, frequency up to 80 MHz,MPU,100DMlPS and DSP instructions

      Peromance benchmark

- 1.25 DMIPS/MHz(Drystone 2.1)

- 273.55 CoreMark®(3.42 CoreMark/MHz @ 80 MHz)

      Energy benchmark

- 294 ULPMark™ CP score

- 106 ULPMark™ PP score

      Clock Sources

- 4 to 48 MHz crystal oscillator

- 32 kHz crystal oscillator for RTC (LSE)

- Interal 16 MHz factory-trimmed RC (±1%)

- Interal low-power 32 kHz RC (±5%)

- Intemal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than +0.25 % accuracy)

- 3 PLLs for system clock, audio, ADC

      Up to 114 fast l/Os, most 5 V-tolerant, up to 14 l/Os with independent supply down to 1.08 V

      RTC with HW calendar, alarms and calibration

      Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors

      16 x timers: 2 x16-bit advanced motor-control, 2x 32-bit and 5x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode),2x watchdogs, SysTick timer

      Memories

- Up to 1 MB Flash, 2 banks read-while-write, proprietary code readout protection

- Up to 128 KB of SRAM including 32 KB with hardware parity check

- Extemal memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories

- Quad SPl memory interface

      4 x digital filters for sigma delta modulator

      Rich analog peripherals (independent supply)

- 3 x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 μA/Msps

- 2 x 12-bit DAC output channels, low-power sample and hold

- 2 x operational amplifiers with built-in PGA

- 2 x ultra-low-power comparators

    19 x communication interfaces

- 2 x SAls (serial audio interface)

- 3 x12C FM+(1 Mbit/s),SMBuS/PMBus

- 5 x USARTS (ISO 7816, LIN, IrDA modem)

- 1 x LPUART (Stop 2 wake-up)

- 3 x SPIs (and 1x Quad SPl)

- CAN (2.0B Active) and SDMMC interface

- SWPMl single wire protocol master I/F

- IRTIM (nfrared interface)

     14-channel DMA controller

     True random number generator

     CRC calculation unit, 96-bit unique lD

     Development support: serial wire debug (SWD), JTAG, Embedded Trace Mlacrocell™

     All packages are ECOPACK2® compliant

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