原标题：Renesas RX200系列MCU 3D打印机解决方案

　　Renesas公司的RX200系列mcu基于32位RX CPU核,工作频率50MHz时的性能高达78 DMIPS,单电源1.62-V到5.5-V工作,高达1MB闪存,12位ADC和10位DAC,集成了ELC,MPC,RTC和多达15路通信通路以及和IEC60730兼容的功能,主要用在通用工业和消费类设备.本文介绍了RX200系列主要特性和框图,入门套件RSKRX210B主要特性,框图,PCB元件分布图,电路图以及3D打印机系统框图.

　　The extreme evolution to embedded systems led by Renesas’ new RX MCU family. Equipped with a new-generation core, the RX family can respond to the ever-increasing demands and challenges on the MCUs of today and tomorrow.

　　Even higher performance, greater code efficiency, lower power consumption, and more integration have been achieved, while providing legacy, enhanced and new peripheral functions for many applications.

　　The low power series of the RX Family. The RX200 product series combines the high calculation performance of the RX600 and new low power and safety capabilities.

　　RX200系列主要特性:

　　■ 32-bit RX CPU core

　　 Max.operating frequency: 50 MHzCapable of 78 DMIPS in operation at 50 MHz

　　 Accumulator handles 64-bit results (for a single instruction)from 32- × 32-bit operations

　　 Multiplication and division unit handles 32- × 32-bitoperations (multiplication instructions take one CPU clockcycle)

　　 Fast interrupt

　　 CISC Harvard architecture with 5-stage pipeline

　　 Variable-length instructions, ultra-compact code

　　 On-chip debugging circuit

　　■ Low power design and architecture

　　 Operation from a single 1.62-V to 5.5-V supply

　　 1.62-V operation available (at up to 20 MHz)

　　 Deep software standby mode with RTC remaining usable

　　 Four low power consumption modes

　　■ On-chip flash memory for code, no wait states

　　 50-MHz operation, 20-ns read cycle

　　 No wait states for reading at full CPU speed

　　 64-K to 1-Mbyte capacities

　　 User code programmable via the SCI

　　 Programmable at 1.62 V

　　 For instructions and operands

　　■ On-chip data flash memory

　　 8 Kbytes(Number of times of reprogramming: 100,000)

　　 Erasing and programming impose no load on the CPU.

　　■ On-chip SRAM, no wait states

　　 12-K to 96-Kbyte size capacities

　　■ DMA

　　 DMAC: Incorporates four channels

　　 DTC: Four transfer modes

　　■ ELC

　　 Module operation can be initiated by event signals withoutgoing through interrupts.

　　 Modules can operate while the CPU is sleeping.

　　■ Reset and supply management

　　 Nine types of reset, including the power-on reset (POR)

　　 Low voltage detection (LVD) with voltage settings

　　■ Clock functions

　　 Frequency of external clock: Up to 20 MHz

　　 Frequency of the oscillator for sub-clock generation: 32.768kHz

　　 PLL circuit input: 4 MHz to 12.5 MHz

　　 On-chip low- and high-speed oscillators, dedicated on-chiplow-speed oscillator for the IWDT

　　 Generation of a dedicated 32.768-kHz clock for the RTC

　　 Clock frequency accuracy measurement circuit (CAC)

　　■ Realtime clock

　　 Adjustment functions (30 seconds, leap year, and error)

　　 Year and month display or 32-bit second display (binarycounter) is selectable

　　 Time capture function

　　 Time capture on event-signal input through external pins

　　 RTC capable of initiating return from deep software standbymode

　　■ Independent watchdog timer

　　 125-kHz on-chip oscillator produces a dedicated clock signalto drive IWDT operation

　　■ Useful functions for IEC60730 compliance

　　 Self-diagnostic and disconnection-detection assistancefunctions for the A/D converter, clock frequency accuracymeasurement circuit, independent watchdog timer, functionsto assist in RAM testing, etc.

　　■ Up to 15 communications channels

　　 SCI with many useful functions (up to 13 channels)

　　Asynchronous mode, clock synchronous mode, smart cardinterface

　　 I2C bus interface: Transfer at up to 400 kbps, capable ofSMBus operation (one channel)

　　 RSPI (one channel): Transfer at up to 16 Mbps (768-Kbyte/1-Mbyte flash memory or 144/145-pin products)

　　■ External address space

　　 Four CS areas (4 × 16 Mbytes)

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

　　■ Up to 20 extended-function timers

　　 16-bit MTU: input capture, output compare, complementaryPWM output, phase counting mode(six channels)

　　 16-bit TPU: input capture, output capture, phase countingmode (six channels)

　　 8-bit TMR (four channels)

　　 16-bit compare-match timers (four channels)

　　■ 12-bit A/D converter

　　 Capable of conversion within 1 μs

　　 Sample-and-hold circuits (for three channels)

　　 Three-channel synchronized sampling available

　　 Self-diagnostic function and analog input disconnectiondetection assistance function

　　■ 10-bit D/A converter

　　■ Analog comparator

　　■ General I/O ports

　　 5-V tolerant, open drain, input pull-up, switching of drivingability

　　■ MPC

　　 Multiple locations are selectable for I/O pins of peripheralfunctions

　　■ Temperature sensor

　　■ Operating temp.range

　　 40℃ to +85℃

　　 40℃ to +105℃

　　■ Applications

　　 69WLBGA (SWBG0069LA-A): General consumerequipment

　　 Other than above package: General industrial and consumerEquipment

　　图1。RX200系列框图

　　入门套件RSKRX210B

　　The Renesas Starter Kit for RX210 (B Mask) is intended as a user-friendly introductory and evaluation tool for the RX210 microcontroller. The board also provides a useful platform for evaluating the Renesas suite of development tools for coding and debugging, using High-performance Embedded Workshop*1 as well as programming the device using E1 emulator and/or Flash Development Toolkit.

　　The Renesas Starter Kit for RX210 (B Mask) may be connected to the host PC using a simple RS232 serial connection or via the included USB E1 on chip debugging interface.

　　The purpose of the board is to enable the user to evaluate the capabilities of the device and its peripherals by giving the user a simple platform on which code can be run only minutes from opening box. It can also prove an invaluable tool in development by providing a useful test platform for code already debugged using one of our more powerful emulation tools.

　　图2.入门套件RSKRX210B外形图

　　入门套件RSKRX210B包括:

　　CPU Board

　　Detachable LCD Display Module

　　Detachable AD Adjustment Shaft

　　E1 Emulator

　　Connection Cable (USB Cable, User Interface Cable)

　　Quick Start Guide

　　CD-ROM

　　- Documents: User Manual, Tutorial, and more

　　- IDE: High-performance Embedded Workshop

　　- C Compiler: C/C++ Compiler Package for RX Family Evaluation Version

　　- Debugger: E1/E20 Emulator Debugger

　　入门套件RSKRX210B主要特性:

　　• Renesas microcontroller programming

　　• User code debugging

　　• User circuitry such as switches, LEDs and a potentiometer

　　• Sample application

　　• Sample peripheral device initialisation code

　　图3.入门套件RSKRX210B框图

　　图4.入门套件RSKRX210B元件布局图

　　图5.入门套件RSKRX210B顶层元件分布图

　　3D打印机

　　3D printers are attracting attention as the prices of personal hobby use low-cost versions drop. Many low-cost 3D printers use the Fused Deposition Modeling method and control 3D coordinates by controlling a plastic outputting head in 2D coordinates and controlling the height of the stage. A plastic loader motor and a cooling fan motor also require PWM output. In addition, large-capacity flash ROM and a high-performance CPU are required for high-speed processing of large volume data. Also required are serial I/O for receiving date from a PC via USB or flash memory media devices and controlling LCD panel modules.

　　Renesas Electronics offers the RX200 Series, which has a high-performance CPU, PWM for controlling stepper motors and serial I/O for communicating with various peripheral devices, and the RX600 Series, which has an RSPI for controlling serial flash as well as semiconductor devices such as an LED driver IC, op-amp and reset IC for 3D printers.

　　System Block Diagram