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[原创] Renesas RA2A1系列超低功耗32位ARM MCU开发方案

关键词:Arm Cortex-M23 MCU 工业自动化 RA2A1

时间:2020-01-17 10:40:48       来源:中电网

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

图5.评估板EK-RA2A1 v1电路图(1)

图6.评估板EK-RA2A1 v1电路图(2)

图7.评估板EK-RA2A1 v1电路图(3)

图8.评估板EK-RA2A1 v1电路图(4)
评估板EK-RA2A1 v1材料清单:


图9.评估板EK-RA2A1 v1 PCB设计图(1)

图10.评估板EK-RA2A1 v1 PCB设计图(2)

图11.评估板EK-RA2A1 v1 PCB设计图(3)
详情请见:
https://www.renesas.com/eu/en/doc/products/mpumcu/doc/ra/001/r01ds0354ej0100-ra2a1.pdf
https://www.renesas.com/eu/en/software/D6003946.html
以及https://www.renesas.com/eu/en/doc/products/mpumcu/doc/ra/001/r20ut4580eu0100-ek-ra2a1-v1-um.pdf
r01ds0354ej0100-ra2a1.pdf
r20ut4580eu0100-ek-ra2a1-v1-um.pdf

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