原标题：Renesas RA6M2高性能ARM MCU IoT开发方案

　　Renesas公司的RA6M2系列是采用高性能Arm® Cortex®-M4核的微控制器(mcu),提供单个DMA的以太网MAC,从而保证高数据吞吐量.采用高效的40nm工艺制造,支持开源和灵活的生态系统概念(基FreeRTOS的灵活软件包(FSP)),并可扩展使用其它RTOS和中间件.MCU集成了多个软件和引脚兼容的基于Arm® 32位核,共享Renesas外设基本集,便于设计升级和基于有效平台的产品开发.MCU核的工作频率高达120MHz,高达1MB的代码闪存和384kB SRAM.它的浮点单元(FPU)具有DSP指令集的Armv7E-M架构,支持4GB地址空间,片上调试系统有JTAG, SWD和ETM,边界扫描和ARM存储器保护单元(ARM MPU).器件的连接性包括以太网MAC控制器(ETHERC),以太网DMA控制器(EDMAC)以及USB 2.0全速(USBFS)模块.中电网为您整理如下详细资料,主要用在有线以太网,安全系统(防火检测,窃贼探测和面板控制),计量(电表,自动读表),工业(机器人,门开启器,缝纫机,售货机和UPS)以及HVAC(加热,空调,锅炉控制)和通用.本文介绍了RA6M2主要特性,框图和评估板EK-RA6M2 v1主要特性,框图,电路图,材料清单和PCB设计图.

　　The Renesas RA6M2 group of microcontrollers (MCUs) uses the high-performance Arm® Cortex®-M4 core and offers Ethernet MAC with individual DMA, to ensure high data throughput. The RA6M2 is built on a highly efficient 40nm process and is supported by an open and flexible ecosystem concept—the Flexible Software Package (FSP), built on FreeRTOS—and is expandable to use other RTOSes and middleware. The RA6M2 is suitable for IoT applications requiring Ethernet, security, large embedded RAM, and low active power consumption.

　　The MCU integrates multiple series of software- and pin-compatible Arm®-based 32-bit cores that share a common setof Renesas peripherals to facilitate design scalability and efficient platform-based product development.

　　The MCU in this series incorporates a high-performance Arm Cortex®-M4 core running up to 120 MHz with thefollowing features:

　　 Up to 1-MB code flash memory

　　 384-KB SRAM

　　 Capacitive Touch Sensing Unit (CTSU)

　　 Ethernet MAC Controller (ETHERC), USBFS, SD/MMC Host Interface

　　 Quad Serial Peripheral Interface (QSPI)

　　 Security and safety features

　　 12-bit A/D Converter (ADC12)

　　 12-bit D/A Converter (DAC12)

　　 Analog peripherals.

　　RA6M2主要特性:

　　■ Arm Cortex-M4 Core with Floating Point Unit (FPU)

　　 Armv7E-M architecture with DSP instruction set

　　 Maximum operating frequency: 120 MHz

　　 Support for 4-GB address space

　　 On-chip debugging system: JTAG, SWD, and ETM

　　 Boundary scan and Arm Memory Protection Unit (Arm MPU)

　　■ Memory

　　 Up to 1-MB code flash memory (40 MHz zero wait states)

　　 32-KB data flash memory (125,000 erase/write cycles)

　　 Up to 384-KB SRAM

　　 Flash Cache (FCACHE)

　　 Memory Protection Units (MPU)

　　 Memory Mirror Function (MMF)

　　 128-bit unique ID

　　■ Connectivity

　　 Ethernet MAC Controller (ETHERC)

　　 Ethernet DMA Controller (EDMAC)

　　 USB 2.0 Full-Speed (USBFS) module

　　- On-chip transceiver

　　 Serial Communications Interface (SCI) with FIFO × 10

　　 Serial Peripheral Interface (SPI) × 2

　　 I2C bus interface (IIC) × 3

　　 Controller Area Network (CAN) × 2

　　 Serial Sound Interface Enhanced (SSIE)

　　 SD/MMC Host Interface (SDHI) × 2

　　 Quad Serial Peripheral Interface (QSPI)

　　 IrDA interface

　　 Sampling Rate Converter (SRC)

　　 External address space

　　- 8-bit or 16-bit bus space is selectable per area

　　- SDRAM support

　　■ Analog

　　 12-bit A/D Converter (ADC12) with 3 sample-and-hold circuitseach × 2

　　 12-bit D/A Converter (DAC12) × 2

　　 High-Speed Analog Comparator (ACMPHS) × 6

　　 Temperature Sensor (TSN)

　　■ Timers

　　 General PWM Timer 32-bit Enhanced High Resolution(GPT32EH) × 4

　　 General PWM Timer 32-bit Enhanced (GPT32E) × 4

　　 General PWM Timer 32-bit (GPT32) × 6

　　 Asynchronous General-Purpose Timer (AGT) × 2

　　 Watchdog Timer (WDT)

　　■ Safety

　　 Error Correction Code (ECC) in SRAM

　　 SRAM parity error check

　　 Flash area protection

　　 ADC self-diagnosis function

　　 Clock Frequency Accuracy Measurement Circuit (CAC)

　　 Cyclic Redundancy Check (CRC) calculator

　　 Data Operation Circuit (DOC)

　　 Port Output Enable for GPT (POEG)

　　 Independent Watchdog Timer (IWDT)

　　 GPIO readback level detection

　　 Register write protection

　　 Main oscillator stop detection

　　 Illegal memory access

　　■ System and Power Management

　　 Low power modes

　　 Realtime Clock (RTC) with calendar and VBATT support

　　 Event Link Controller (ELC)

　　 DMA Controller (DMAC) × 8

　　 Data Transfer Controller (DTC)

　　 Key Interrupt Function (KINT)

　　 Power-on reset

　　 Low Voltage Detection (LVD) with voltage settings

　　■ Security and Encryption

　　 AES128/192/256

　　 3DES/ARC4

　　 SHA1/SHA224/SHA256/MD5

　　 GHASH

　　 RSA/DSA/ECC

　　 True Random Number Generator (TRNG)

　　■ Human Machine Interface (HMI)

　　 Capacitive Touch Sensing Unit (CTSU)

　　 Parallel Data Capture Unit (PDC)

　　■ Multiple Clock Sources

　　 Main clock oscillator (MOSC) (8 to 24 MHz)

　　 Sub-clock oscillator (SOSC) (32.768 kHz)

　　 High-speed on-chip oscillator (HOCO) (16/18/20 MHz)

　　 Middle-speed on-chip oscillator (MOCO) (8 MHz)

　　 Low-speed on-chip oscillator (LOCO) (32.768 kHz)

　　 IWDT-dedicated on-chip oscillator (15 kHz)

　　 Clock trim function for HOCO/MOCO/LOCO

　　 Clock out support

　　■ General-Purpose I/O Ports

　　 Up to 110 input/output pins

　　- Up to 1 CMOS input

　　- Up to 109 CMOS input/output

　　- Up to 21 input/output 5 V tolerant

　　- Up to 18 high current (20 mA)

　　■ Operating Voltage

　　 VCC: 2.7 to 3.6 V

　　■ Operating Temperature and Packages

　　 Ta = -40℃ to +85℃

　　- 145-pin LGA (7 mm × 7 mm, 0.5 mm pitch)

　　 Ta = -40℃ to +105 ℃

　　- 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch)

　　- 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch)

　　RA6M2应用:

　　Wired Ethernet applications

　　Security (fire detection, burglar detection, panel control)

　　Metering (electricity, automated meter reading)

　　Industry (robotics, door openers, sewing machines, vending machines, UPS)

　　HVAC (heating, air conditioning, boiler control)

　　General purpose

　　图1.RA6M2框图

　　评估板EK-RA6M2 v1

　　Evaluation Kit for RA6M2 Microcontroller Group EK-RA6M2 v1

　　The EK-RA6M2 v1 enables developers to get started with initial firmware development.

　　• Renesas RA6M2 Microcontroller Group

　　 R7FA6M2AF3CFB

　　 144-pin LQFP package

　　 120 MHz Arm® Cortex®-M4 core with Floating Point Unit (FPU)

　　 384 KB SRAM

　　 1 MB code flash memory

　　 32 KB data flash memory

　　• Connectivity

　　 A Device USB connector for the Main MCU

　　 SEGGER J-Link® On-Board (OB) interface for debugging and programming of the RA6M2 MCU. A 10-pin JTAG/SWD interface is also provided for connecting optional external debuggers and programmers.

　　 Two PMOD connectors, allowing use of appropriate PMOD compliant peripheral plug-in modules for rapid prototyping

　　 Pin headers for access to power and signals for the Main MCU

　　• Multiple clock sources

　　 Main MCU oscillator crystals, providing precision 12.000 MHz and 32,768 Hz external reference clocks  Additional low-precision clocks are available internal to the Main MCU

　　• MCU reset push-button switch

　　• MCU boot configuration jumper

　　• General purpose I/O ports

　　 One jumper to allow measuring of Main MCU current

　　 Copper jumpers on PCB bottom side for configuration and access to selected MCU signals

　　• Operating voltage

　　 External 5 V input through the Debug USB connector supplies the on-board power regulator to power logic and interfaces on the board. Alternatively, 5 V or 3.3 V may be supplied through alternate locations on the board.

　　• A two-color board status LED indicating availability of regulated power and connection status of the J-Link interface

　　• A red User LED, controlled by the Main MCU firmware

　　• A User Push-Button switch, User Capacitive Touch Sensor (button), and an optional User Potentiometer, all are controlled by the Main MCU firmware

　　图2.评估板EK-RA6M2 v1外形图(正面)

　　图3.评估板EK-RA6M2 v1外形图(背面)

　　图4.评估板EK-RA6M2 v1外形图(全套)

　　图5.评估板EK-RA6M2 v1框图