原标题：Renesas RA2A1系列超低功耗32位ARM MCU开发方案

　　Renesas公司的RA2A1系列是采用高性能 Arm® Cortex®-M23 内核的超低功耗32位ARM mcu,工作频率48MHz,提供高度集成的高精度模拟性能. RA2A1 系列产品支持 1.6 V 至 5.5 V工作电压范围.RA2A1系列集成了16 位 SAR ADC,24 位 Sigma Delta ADC,比较器,运算放大器和12位和8位DAC,高达256KB代码闪存,32KB SRAM和容性触摸检测单元以及安全特性.此外还集成了全速USB 2.0,CAN 2.0和SCI(UART,简单 SPI,简单 I2C).RA2A1系列MCU 面向成本敏感和低功耗工业传感器应用,高解析度模拟将成为成本优势.主要用在工业自动化(光电传感器,光纤传感器,温度传感器),过程自动化(压力传感器,流量控制计,单相表),楼宇自动化/家用电器(烟雾探测器),以及保健(脉搏血氧仪,身体指数测量)和一般用途.本文介绍了RA2A1系列主要特性,框图和评估板EK-RA2A1 v1主要特性,框图,电路图,材料清单和PCB设计图.

　　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 an energy-efficient Arm Cortex®-M23 32-bit core that is particularly well suited forcost-sensitive and low-power applications, with the following features:

　　 Up to 256-KB code flash memory

　　 32-KB SRAM

　　 16-bit A/D Converter (ADC16)

　　 24-bit Sigma-Delta A/D Converter (SDADC24)

　　 12-bit D/A Converter (DAC12)

　　 8-bit D/A Converter (DAC8)

　　 Operational Amplifier (OPAMP) with configurable switches

　　 Security features.

　　RA2A1系列主要特性:

　　■ Arm Cortex-M23 Core

　　 Armv8-M architecture

　　 Maximum operating frequency: 48 MHz

　　 Arm Memory Protection Unit (Arm MPU) with 8 regions

　　 Debug and Trace: DWT, FPB, and CoreSight™ MTB-M23

　　 CoreSight Debug Port: SW-DP

　　■ Memory

　　 Up to 256-KB code flash memory

　　 8-KB data flash memory (100,000 program/erase (P/E) cycles)

　　 Up to 32-KB SRAM

　　 Flash Cache (FCACHE)

　　 Memory Protection Unit (MPU)

　　 Memory Mirror Function (MMF)

　　 128-bit unique ID

　　■ Connectivity

　　 USB 2.0 Full-Speed (USBFS) module

　　- On-chip transceiver with voltage regulator

　　- Compliant with USB Battery Charging Specification 1.2

　　 Serial Communications Interface (SCI) × 3

　　- UART

　　- Simple IIC

　　- Simple SPI

　　 Serial Peripheral Interface (SPI) × 2

　　 I2C bus interface (IIC) × 2

　　 Controller Area Network (CAN) module

　　■ Analog

　　 16-bit A/D Converter (ADC16)

　　- 1.2 Msps

　　- Differential input mode

　　- Single-ended input mode

　　 24-bit Sigma-Delta A/D Converter (SDADC24)

　　- 15.6 ksps

　　- Differential input mode

　　- Single-ended input mode

　　 12-bit D/A Converter (DAC12)

　　 8-bit D/A Converter (DAC8) × 2

　　 High-Speed Analog Comparator (ACMPHS)

　　 Low-Power Analog Comparator (ACMPLP) × 2

　　 Operational Amplifier (OPAMP) × 3

　　 Temperature Sensor (TSN)

　　■ Timers

　　 General PWM Timer 32-bit (GPT32)

　　 General PWM Timer 16-bit (GPT16) × 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)

　　 Event Link Controller (ELC)

　　 Data Transfer Controller (DTC)

　　 Key Interrupt Function (KINT)

　　 Power-on reset

　　 Low Voltage Detection (LVD) with voltage settings

　　■ Security and Encryption

　　 AES128/256

　　 True Random Number Generator (TRNG)

　　■ Human Machine Interface (HMI)

　　 Capacitive Touch Sensing Unit (CTSU)

　　■ Multiple Clock Sources

　　 Main clock oscillator (MOSC)

　　(1 to 20 MHz when VCC = 2.4 to 5.5 V)

　　(1 to 8 MHz when VCC = 1.8 to 5.5 V)

　　(1 to 4 MHz when VCC = 1.6 to 5.5 V)

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

　　 High-speed on-chip oscillator (HOCO)

　　(24, 32, 48, 64 MHz when VCC = 2.4 to 5.5 V)

　　(24, 32, 48 MHz when VCC = 1.8 to 5.5 V)

　　(24, 32 MHz when VCC = 1.6 to 5.5 V)

　　 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 49 input/output pins

　　- Up to 3 CMOS input

　　- Up to 46 CMOS input/output

　　- Up to 9 input/output 5 V tolerant

　　- Up to 3 high current (20 mA)

　　■ Operating Voltage

　　 VCC: 1.6 to 5.5 V

　　■ Operating Temperature and Packages

　　 Ta = -40℃ to +85℃

　　- 36-pin BGA (5 mm × 5 mm, 0.8 mm pitch)

　　 Ta = -40°C to +105℃

　　- 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch)

　　- 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch)

　　- 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch)

　　- 40-pin QFN (6 mm × 6 mm, 0.5 mm pitch)

　　目标应用:

　　■Industrial Automation (Photoelectric Sensor, Fiber Sensor,

　　Temperature Sensor)

　　■Process Automation (Pressure Sensor, Flow control meter,

　　Single Phase Meter)

　　■Building Automation/Home Appliance (Smoke Detector)

　　■Healthcare (Pulse Oximeters, Body Composition Measurement)

　　■General Purpose

　　图1.RA2A1 框图

　　评估板EK-RA2A1 v1

　　评估板EK-RA2A1 v1主要特性

　　The EK-RA2A1 v1 enables developers to get started with initial firmware development.

　　• Renesas RA2A1 Microcontroller Group

　　 R7FA2A1AB3CFM

　　 64-pin LQFP package

　　 48 MHz Arm® Cortex®-M23 core (Armv8-M architecture) with Arm MPU

　　 32 KB SRAM

　　 256 KB code flash memory

　　 8 KB data flash memory

　　• Connectivity

　　 A Device USB connector for the Main MCU

　　 S124 MCU based SEGGER J-Link® On-Board interface for debugging and programming of the RA2A1 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 5V input through the Debug USB connector supplies the on-board power regulator, which provides 3.3V to power the board logic and interfaces. External 5V or 3.3V may be also supplied through alternate locations on the Evaluation Kit 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 Button sensor, and an optional User Potentiometer, all of which are controlled by the Main MCU firmware

　　图2.评估板EK-RA2A1 v1外形图:正面

　　图3.评估板EK-RA2A1 v1外形图:背面

　　The following components are included in the kit:

　　1. One EK-RA2A1 board

　　2. One USB Type-A to USB Micro-B cable

　　图4.评估板EK-RA2A1 v1框图

　　评估板EK-RA2A1 v1材料清单: