STM32L422RB数据手册ST中文资料规格书

描述 Description

The STM32L422xx devices are 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 that 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 STM32L422xx devices embed high-speed memories (flash memory up to 128 Kbyte, 40 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 STM32L422xx devices embed several protection mechanisms for embedded flash memory and SRAM: readout protection, write protection, proprietary code readout protection and Firewall.

The devices offer two fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, 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 12 capacitive sensing channels are available.

They also feature standard and advanced communication interfaces, namely three I2Cs, two SPIs, three USARTs and one Low-Power UART, one USB full-speed device crystal less.

The STM32L422xx devices embed an AES hardware accelerator.

The STM32L422xx operates 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 VDD power supply. A comprehensive set of power-saving modes makes possible the design of low-power applications.

Some independent power supplies are supported: analog independent supply input for ADC, OPAMP and comparator. A VBAT input makes it possible to backup the RTC and backup registers.

The STM32L422xx family offers six packages from 32 to 64-pin packages.

特性 Features

• Includes ST state-of-the-art patented technology
•Ultra-low-power with FlexPowerControl
• 1.71 V to 3.6 V power supply
• -40 °C to 85/125 °C temperature range
• 300 nA in VBAT mode: supply for RTC and 32x32-bit backup registers
• 16 nA Shutdown mode (4 wakeup pins)
• 32 nA Standby mode (4 wakeup pins)
• 245 nA Standby mode with RTC
• 0.7 µA Stop 2 mode, 0.95 µA with RTC
• 79 µA/MHz run mode (LDO Mode)
• Batch acquisition mode (BAM)
• 4 µs wakeup from Stop mode
• Brown out reset (BOR)
• 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 and DSP instructions
•Performance benchmark
• 1.25 DMIPS/MHz (Drystone 2.1)
• 273.55 CoreMark® (3.42 CoreMark/MHz @ 80 MHz)

•Energy benchmark
• 442 ULPMark-CP®
• 165 ULPMark-PP®

•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
• PLL for system clock

•Up to 52 fast I/Os, most 5 V-tolerant
•RTC with HW calendar, alarms and calibration
•Up to 12 capacitive sensing channels: support touchkey, linear and rotary touch sensors
•10x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 2x 16-bit general purpose, 1x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
•Memories
• 128 KB single bank flash, proprietary code readout protection
• 40 KB of SRAM including 8 KB with hardware parity check
• Quad SPI memory interface with XIP capability

•Rich analog peripherals (independent supply)
• 2x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 µA/Msps
• 1x operational amplifier with built-in PGA
• 1x ultra-low-power comparator

•AES: 128/256-bit key encryption hardware accelerator
•12x communication interfaces
• USB 2.0 full-speed crystal less solution with LPM and BCD
• 3x I2C FM+(1 Mbit/s), SMBus/PMBus
• 3x USARTs (ISO 7816, LIN, IrDA, modem)
• 1x LPUART (Stop 2 wake-up)
• 2x SPIs (and 1x Quad SPI)
• IRTIM (Infrared interface)

•14-channel DMA controller
•True random number generator
•CRC calculation unit, 96-bit unique ID
•Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
•All packages are ECOPACK2 compliant