原标题：Renesas RE01系列64 MHz 32位ARM MCU开发方案

　　Renesas公司的RE01系列是采用创新SOTB™技术并实现了超低工作电流和超低待机电流以及高速工作(最大64MHz)的32位ARM mcu,工作电压1.62V.其嵌入的控制器可有能量收获来工作.RE01系列配备了能量收获控制电路,超低功耗14位ADC(大约4uA),闪存(重写低于是1mA),并行MIP-LCD接口,2D图像,改善时钟的UI和安全功能如信用的安全IP等.此外还集成了大容量1.5MB闪存和256KB SRAM,基准电压工作电路,RTC,USB 2.0全速模块,SPI和quad SPI.工作温度–40到+85℃.主要用在可穿戴设备,家用电器,建筑物自动化,工业传感器设备,智能锁,财产跟踪和其它低功耗应用.本文介绍了RE01系列主要特性,框图和Cortex-M0+ CPU框图以及RE01 1500KB 评估套件(主板和MIP-LCD扩展板)主要特性和指标,框图,电路图和材料清单.

　　The RE01 Group uses Renesas’innovative SOTB™ process technology and realizes both ultra-low active current and ultra-low standby current, and high-speed operation (maximum 64MHz) at low voltage (1.62V), which is impossible with a conventional bulk transistor, and is an embedded controller that can operate by energy harvesting. It is equipped with an energy harvesting control circuit, ultra-low power consumption 14-bit ADC (approx. 4uA), flash (rewrite at less than 1mA), parallel MIP-LCD interface, 2D graphics, UI for clock movement, and security functions such as a trusted secure IP. It also has large-capacity 1.5MB flash and 256KB SRAM that can handle data logging and firmware updates. Therefore, the RE01 Group is suitable for wearable devices, home appliances, building automation, industrial sensor devices, smart locks, asset trackers, and other applications.

　　RE01系列主要特性:

　　■ Arm® Cortex®-M0+ core incorporated

　　· Maximum operating frequency: 64 MHz (boost mode)

　　· ARM® Memory Protection Unit (MPU)

　　· CoreSight™ debug port: SW-DP

　　■ Power-saving functions

　　· Back-bias control function based on silicon-on-thin-buried-oxide(SOTB™) process technology

　　· Operation at ultra-low power-supply voltages (from 1.62 V to 3.6 V)

　　· Four power control modes based on the operating frequency

　　· Four low power consumption modes

　　· Three power supply modes

　　■ On-chip code flash memory

　　· 1.5-Mbyte code flash memory

　　· Background programming/erasing

　　· No cycles of waiting for access in operation at or below 32 MHz;one cycle of waiting at frequencies above 32 MHz

　　· Function for area protection prevents erroneous overwriting ortampering

　　■ On-chip SRAM

　　· 256-Kbyte SRAM with no access wait cycles

　　■ Data transfer

　　· Four DMA controllers

　　· Single data transfer controller (DTC)

　　■ Reset and supply management

　　· Power-on reset circuit (POR)

　　· Low voltage detection (LVD) can be set.

　　■ Multiple clock sources

　　· External crystal oscillator (main clock): 8 to 32 MHz

　　· External crystal oscillator (sub-clock): 32.768 kHz

　　· High-speed on-chip oscillator (HOCO): 24, 32, 48, or 64 MHz

　　· Middle-speed on-chip oscillator (MOCO): 2 MHz

　　· Low-speed on-chip oscillator (LOCO): 32 kHz

　　· Independent watchdog timer on-chip oscillator: 16 kHz

　　· PLL frequency synthesizer

　　■ Energy harvesting control

　　· A power generation element is directly connectable.

　　· High-speed startup is possible without having to wait for the chargingof a secondary battery.

　　· Function to prevent a secondary battery from overcharging

　　■ Independent watchdog timer

　　· 14-bit counter, 16-kHz (1/2 LOCO clock frequency) operation

　　■ Sub-clock correction circuit (CCC)

　　· The CCC corrects the accuracy of oscillation every 16 seconds(theoretical regulation).

　　· Events can be generated per second in deep software standby mode.

　　■ Communication functions

　　· Single USB 2.0 full-speed host/function module with PHY layer

　　· Two serial peripheral interfaces

　　Single 128-bit buffer for which up to eight commands can be specified

　　Single 32-bit buffer for which one command can be specified

　　· Single quad serial peripheral interface connectable to an external flashmemory

　　· Two I2C bus interfaces

　　· Five serial communications interfaces (SCIg)

　　Asynchronous, clock-synchronous, simple I2C, simple SPI, and smartcard interfaces, and IrDA interface version 1.0 (the latter is onlyapplicable to SCI0)

　　· Two serial communication interfaces (SCIi) each having a 16-byteFIFO

　　■ Various analog circuits

　　· Single 14-bit successive approximation A/D converterHigh precision: 7 channels, standard precision: 11 channels

　　· Single 12-bit D/A converter with a buffer amplifier

　　· Single analog comparator (ACMP)

　　· Single temperature sensor for measuring the internal temperature of thechip

　　· Reference voltage generation circuit for the 14-bit A/D converter

　　· Single motor driver control circuit (MTDV)

　　The MTDV can drive up to three motors.

　　· Single constant current (1 mA or 0.5 mA) source circuit with threechannels that can drive three external LEDs

　　■ Various timer circuits

　　· Six general PWM timers (GPT)

　　Two 32-bit counters

　　Four 16-bit counters

　　· Two asynchronous general-purpose timers (AGT) that can be used instandby mode

　　· Two 8-bit timers (TMR)

　　· Single realtime clock (RTC)

　　· Single watchdog timer (WDT)

　　· Single low-speed timer (LST) that operates at 1 kHz

　　A circuit for converting hexadecimal numbers to decimal numbers foruse as a stopwatch

　　· Single low-speed pulse generator (LPG)

　　Pulse output at two frequencies (2.048 or 4.096 kHz) is possible.

　　■ Human machine interfaces

　　· Single memory-in-pixel (MIP) LCD controller (MLCD)Parallel interface is supported.

　　· Single 2D graphics data conversion circuit (GDT)

　　■ Security functions (optional)

　　· Single Trusted Secure IP Lite (TSIP)

　　· AES (128- or 256-bit key length, supporting ECB, CBC, CMAC,GCM, and others)

　　· Key wrapping protects against the leakage of the encryption keysof users.

　　· An access management circuit disables illicit access to theencryption engine.

　　· Using the other security functions together with area protectionenables secure booting and secure over-the-air (OTA) softwareupdates.

　　■ Operating voltage and temperature range

　　· VCC = IOVCC = 1.62 V to 3.6 V

　　IOVCCn and AVCCn can each be independently set to a voltagewithin the range between 1.62 V and 3.6 V.

　　· Ta: –40 to +85℃

　　图1.RE01系列框图

　　RE01 1500KB 评估套件

　　通过将能量收集与用户的硬件系统相结合来进行评估

　　Evaluation Kit RE01 1500KB allows for evaluation and development by combining energy harvesting with the user’s hardware system, which makes semi-permanent battery maintenance for the RE01 1500KB unnecessary.

　　RE01 1500KB 评估套件主要特性:

　　Energy harvesting system: can be evaluated with the power generation elements, the secondary battery connection interface, and the sample code provided by Renesas.*1 Arduino Uno Header and PMOD interface supported: enable evaluation of energy harvesting system combined with the user’s hardware system.

　　On-board debug function supported: enable program debugging by simply connecting the included USB cable to a host PC.

　　RE01 1500KB 评估套件包括:

　　Evaluation Board RE01 1500KB

　　PMOD-compatible low-power LCD (Memory-In-Pixel LCD) expansion board

　　Solar panel

　　USB cable (Micro-B)

　　RE01 1500KB 评估套件主要指标:

　　图.RE01 1500KB 评估套件板外形图

　　图.RE01 1500KB 评估套件板功能配置图

　　图8.RE01 1500KB 评估套件板框图