Maxim公司的MAX32650/MAX32651/MAX32652是超低功耗存储器可升级的微控制器(MCU),集成了具有浮点单元(FPU)的Arm® Cortex®-M4核和3MB以及1MB SRAM,存储器升级有多个存储器扩展接口包括HyperBus™/Xccela™ DDR接口和两个SPIX接口,安全数字接口支持外接高速存储器卡包括SD,SDIO,MMC,SDHC和microSD™.器件具有120MHz高速和40MHz低功耗振荡器,7.3728MHz低功耗振荡器,32.768kHz和RTC时钟,主要用在运动手表,健美监视器,可穿戴医疗贴片,手持医疗设备,工业传感器和物联网(IoT).本文介绍了MAX32650主要优势和特性,框图,以及评估板MAX32650 EVK优势和特性以及电路图,材料清单.

The MAX32650/MAX32651/MAX32652are ultra-low power memory-scalable microcontrollers designed specifically for high-performance, battery-powered applications. It is based on an Arm® Cortex®-M4 with a floating point unit (FPU) with 3MB flash and 1MB SRAM. Memory scalability is supported with multiple memory-expansion interfaces, including a HyperBus™/Xccela™ DDR interface and two SPI execute in place (SPIX) interfaces. A secure digital interface supports external high-speed memory cards including SD, SDIO, MMC, SDHC, and microSD™.

Extensive power management features provide fine-grained clock and voltage controls. The system clock can be selected from one of four on-chip oscillators from 8kHz to 120MHz as well as the external 32kHz crystal oscillator.Five low power modes provide configurable clocks, peripheral, and power management schemes. Individual SRAM banks of 32KB, 96KB, or 1024KB (full retention) can be placed in a mode to reduce power consumption while retaining SRAM contents.

A SmartDMA performs complex background processing on data being transferred, from simple arithmetic to multiply/accumulate, while the CPU is off. This dramatically reduces overall power consumption compared to conven­tional DMA solutions.

Multiple serial interfaces, each with dedicated FIFOs, allow communication to external sensors. A 4-input, 10-bit ADC monitors system power supplies. An I2S port supportsbidirectional audio streaming.

The MAX32651 includes a trust protection unit (TPU) to provide advanced security features such as a modular arith­metic accelerator (MAA) for fast ECDSA, an AES engine, TRNG, SHA-256 hash, and secure bootloader. A memory decryption integrity unit (MDIU) provides on-the-fly data decryption (plain or executable) stored in external flash.

The MAX32652 is a high-density, 0.35mm pitch, 140-bump WLP package targeted for tiny form factor products that require high I/O counts.

MAX32650主要优势和特性:

Ultra-Efficient Microcontroller for Battery-Powered Applications120MHz Arm Cortex-M4 with FPU

SmartDMA Provides Background Memory Trans­fers with Programmable Data Processing

120MHz High-Speed and 40MHz Low-Power Oscillators

7.3728MHz Low-Power Oscillators

32.768kHz and RTC Clock (Requires External Crystal)

8kHz Always-On Ultra-Low Power Oscillator

3MB Internal Flash

1MB Internal SRAM

104μW/MHz Executing from Cache at 1.1V

Five Low Power Modes: Active, Sleep, Background,Deep-sleep, and Backup

1.8V and 3.3V I/O with No Level Translators

Scalable Cached External Memory Interfaces:120MB/s HyperBus/Xccela DDR Interface

SPIXF/SPIXR for External Flash/RAM Expansion

240Mbps SDHC/eMMC/SDIO/microSD Interface

Optimal Peripheral Mix Provides Platform Scalability16-Channel DMA

Three SPI Master (60MHz)/Slave (48MHz)

One QuadSPI Master (60MHz)/Slave (48MHz)

Up to Three 4Mbaud UARTs with Flow Control

Two 1MHz I2C Master/Slave

I2S Slave

Four-Channel 7.8ksps 10-Bit Delta-Sigma ADC

USB 2.0 Hi-Speed Device Interface with PHY

16 Pulse Train Generators

Six 32-Bit Timers with 8mA High Drive

1-Wire Master

Trust Protection Unit (TPU) for IP/Data SecurityModular Arithmetic Accelerator (MAA),True Random Number Generator (TRNG)

Secure Nonvolatile Key Storage, SHA-256,AES-128/192/256

Memory Decryption Integrity Unit, Secure Boot ROM

MAX32650应用:

Sports Watches, Fitness Monitors

Wearable Medical Patches, Portable Medical Devices

Industrial Sensors, IoT

图1.MAX32650简化框图

评估板MAX32650 EVK

The MAX32650 EV kit provides a platform for evaluating the capabilities of the MAX32650 ultra-low power memory-scalable microcontroller designed specifically for high per­formance battery powered applications.

评估板MAX32650 EVK优势和特性:

3.5in 320 x 240 Color TFT Display

64MB HyperRAM

64MB XIP Flash

1MB XIP RAM

USB 2.0 Micro B Interface

USB 2.0 Micro B to Serial UARTs Selection with Jumpers Between UART0 and UART2

Micro SD Card Interface

Select GPIOs Accessed through 0.1in Header

Access to the Four Analog Input Through 0.1in Header

Arm® or SWD JTAG 20-Pin Header

On-Board PMIC to Source Power for the MAX32650

Board Power Provided by Either USB Port

Individual Power Measurement on All IC Rails Through Jumpers

On-Board 1.8V and 3.3V Regulators for Peripherals

Two General-Purpose LEDs and Two General- Purpose Pushbutton Switches

评估板MAX32650 EVK包括:

MAX32650 EV kit containing a MAX32650 with a preprogrammed demo

JTAG debugger with ribbon cable

Two standard A to Micro B USB cables

图2.评估板MAX32650 EVK外形图

图3.评估板MAX32650 EVK电路图(1)

图4.评估板MAX32650 EVK电路图(2)

图5.评估板MAX32650 EVK电路图(3)

图6.评估板MAX32650 EVK电路图(4)

图7.评估板MAX32650 EVK电路图(5)

图8.评估板MAX32650 EVK电路图(6)

图9.评估板MAX32650 EVK电路图(7)

评估板MAX32650 EVK材料清单:

MAX32650/MAX32651/MAX32652评估板

低功耗Arm Cortex-M4 FPU微控制器，用于电池供电应用

超低功耗、存储器可扩展微控制器，专门设计用于高性能、电池供电应用

说明

MAX32650/MAX32651/MAX32652为超低功耗、存储器可扩展微控制器，专门设计用于高性能、电池供电应用。器件基于Arm® Cortex®-M4，带浮点运算单元(FPU)、3MB闪存和1MB SRAM。支持存储器扩展，带多种存储器扩展接口，包括HyperBus™/Xccela™ DDR接口和两个SPI执行(SPIX)接口。安全数字接口支持外部高速存储卡，包括SD、SDIO、MMC、SDHC和microSD™。

齐全的电源管理特性提供精细时钟和电压控制。系统时钟可从4个片上振荡器(8kHz至120MHz)和外部晶振(32kHz)中进行选择。5种低功耗模式提供可配置时钟、外设和电源管理方案。32KB、96KB或1024KB(全保持)的各个SRAM存储器组可置于一种既能降低功耗又能保留SRAM内容的模式。

SmartDMA对传输的数据执行复杂的后台处理，包括从简单的算术运算到乘法/累积，而CPU保持关闭。这与传统DMA方案相比，能够大大降低总功耗。

多个串行接口，每个接口都具有专用的FIFO，支持与外部传感器通信。4路输入、10位ADC监测系统电源。I²S端口支持双向音频流。

MAX32651具有信赖保护单元(TPU)，提供高级安全特性，例如模运算加速器(MAA，支持快速ECDSA)、AES引擎、TRNG、SHA-256散列算法以及安全装载程序。存储器解密完整性单元(MDIU)提供实时数据解密(纯文本或可执行)，储存在外部闪存中。

MAX32652采用高密度、0.35mm焊球间距、140焊球WLP封装，目标为要求高I/O数量的微小尺寸产品。

MAX32650, MAX32651, MAX32652: Simplified Block Diagram MAX32650, MAX32651, MAX32652: Simplified Block Diagram 放大+

关键特性

超高效微控制器，用于电池供电应用

120MHz Arm Cortex-M4 FPU，工作在1.1V

SmartDMA提供后台存储器传输，带可编程数据处理

120MHz高速和60MHz低功耗振荡器

7.3728MHz低功耗振荡器

32.768kHz和RTC时钟(要求外部晶振)

8kHz常电工作、超低功耗振荡器

3MB内部闪存

1MB内部SRAM

从缓存执行，104µA/MHz @ 1.1V

5种低功耗模式：工作、休眠、后台、深度休眠和备份

1.8V和3.3V I/O，无需电平转换器

可扩展、带缓存外部存储器接口：

120Mbps HyperBus/Xccela DDR2接口

SPIXF用于外部闪存扩展，SPIXR用于外部SRAM扩展

240Mbps SDHC/eMMC/SDIO/microSD接口

最优外设组合，提高平台扩展性

16通道DMA

3个SPI主机(60MHz)/从机(48MHz)

1个QuadSPI主机(60MHz)/从机(48MHz)

多达3个4Mbaud UART，带流控制

2个1MHz I2C主机/从机

I2S从机

四通道、7.8ksps、10位 Δ-Σ ADC

USB 2.0高速设备接口，带PHY

16脉冲序列发生器

6个32位定时器，带8mA高驱动

1-Wire主机

2个看门狗定时器

信赖保护单元(TPU)，用于IP/数据和安全

模运算加速器(MAA)、真随机数发生器(TRNG)

安全非易失密钥存储，SHA-256、AES-128/192/256

存储器解密完整性单元(MDIU)、安全引导ROM