STM32L4R7ZIT6

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1. Describe

The STM32L4R5xx, STM32L4R7ZIT6 and STM32L4R9xx devices are a family of ultra-low-power microcontrollers (STM32L4+ series) based on the high-performance Arm® Cortex®-M4 32-bit RISC core. They operate at frequencies up to 120 MHz. The Cortex-M4 core features a single-precision floating-point unit (FPU) that supports all Arm® single-precision data processing instructions and all data types. The CortexM4 core also implements a full set of DSP (Digital Signal Processing) instructions and a Memory Protection Unit (MPU), enhancing application security. These devices embed high-speed memory (2 MB flash and 640 KB SRAM), a flexible external memory controller (FSMC) for static memory (for devices with 100 or more pins package), two OctoSPI flash interfaces (available on all packages) and various enhanced I/Os and peripherals connected to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix. STM32L4R7ZIT6 devices embed several protection mechanisms for embedded flash and SRAM: read protection, write protection, proprietary code read protection and firewall. These devices provide a fast 12-bit ADC (5 Msps), two comparators, two op amps, two DAC channels, an internal voltage reference buffer, a low-power RTC, two general-purpose 32-bit timers, two 16-bit PWM timers dedicated to motor control, 7 general-purpose 16-bit timers and 2 16-bit low-power timers. These devices support four digital filters for external sigma delta modulators (DFSDM). Additionally, up to 24 capacitive sensing channels are available. The devices operate in the -40 to +85 °C (+105 °C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to 3.6 V for VDD power supply when using internal LDO regulator and a 1.05 to 1.32 V VDD12 power supply when using external SMPS supply. A comprehensive set of power-saving modes allows the design of low-power applications. Some independent power supplies are supported like an analog independent supply input for ADC, DAC, OPAMPs and comparators, a 3.3 V dedicated supply input for USB and up to 14 I/Os, which can be supplied independently down to 1.08 V. A VBAT input allows to backup the RTC and backup the registers. Dedicated VDD12 power supplies can be used to bypass the internal LDO regulator when connected to an external SMPS. The STM32L4R7ZIT6 family offers six packages from 100-pin to 169-pin.

2. Features

    1. Ultra-low-power with FlexPowerControl

        – 1.71 V to 3.6 V power supply

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

        – Batch acquisition mode (BAM)

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

        – 33 nA Shutdown mode (5 wakeup pins)

        – 125 nA Standby mode (5 wakeup pins)

        – 420 nA Standby mode with RTC

        – 2.8 μA Stop 2 with RTC

        – 110 μA/MHz Run mode (LDO mode)

        – 43 μA/MHz Run mode (@ 3.3 V SMPS mode)

        – 5 µs wakeup from Stop mode

        – Brownout reset (BOR) in all modes except shutdown

        – Interconnect matrix

    2. Core: Arm® 32-bit Cortex®-M4 CPU with FPU, adaptive real-time accelerator allowing 0-wait-state execution from Flash memory, frequency up to 120 MHz, MPU, 150 DMIPS/1.25 DMIPS/MHz , and DSP instructions

    3. Performance benckmark

        – 1.25 DMIPS/MHz (Drystone 2.1)

        – 409.20 Coremark® (3.41 Coremark/MHz @120 MHz)

    4. Energy benckmark

        – 233 ULPMark™CP score

        – 56.5 ULPMark™PP score

    5. 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

        – 3 PLLs for system clock, USB, audio, ADC

    6. RTC with HW calendar, alarms and calibration

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

    8. Advanced graphics features

        – Chrom-ART Accelerator (DMA2D) for enhanced graphic content creation

        – Chrom-GRC (GFXMMU) allowing up to 20% of graphic resources optimization

        – MIPI® DSI Host controller with two DSI lanes running at up to 500 Mbits/s each

        – LCD-TFT controller

    9. 16x timers: 2 x 16-bit advanced motor-control, 2 x 32-bit and 5 x 16-bit general purpose, 2x16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer

  10. Up to 136 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V

  11. Memories

        – 2-Mbyte Flash, 2 banks read-while-write, proprietary code readout protection

        – 640 Kbytes of SRAM including 64 Kbytes with hardware parity check

        – External memory interface for static memories supporting SRAM, PSRAM, NOR, NAND and FRAM memories

        – 2 x OctoSPI memory interface

  12. 4x digital filters for sigma delta modulator

  13. Rich analog peripherals (independent supply)

        – 12-bit ADC 5 Msps, up to 1 ware oversampling, 200 µA/Msps

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

        – 2x operational amplifiers with built-in PGA

        – 2x ultra-low-power comparators

  14. 20x communication interfaces

        – USB OTG 2.0 full-speed, LPM and BCD

        – 2x SAIs (serial audio interface)

        – 4x I2C FM+(1 Mbit/s), SMBus/PMBus

        – 6x USARTs (ISO 7816, LIN, IrDA, modem)

        – 3x SPIs (5x SPIs with the dual OctoSPI)

        – CAN (2.0B Active) and SDMMC

  15. 14-channel DMA controller

  16. True random number generator

  17. CRC calculation unit, 96-bit unique ID

  18. 8- to 14-bit camera interface up to 32 MHz (black and white) or 10 MHz (color)

  19. Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell (ETM)

3. Standard and Advanced Communication Interfaces

    1. Four I2C

    2. Three SPIs

    3. Three USARTs, two UARTs, and one low-power UART

    4. Two SAIs

    5. an SDMMC

    6. a jar

    7. One USB OTG full speed

    8. Camera interface

    9. DMA2D controller