ATmega128单片机仿真系统设计及实现

第24卷第7期Vo.l24No.7荆楚理工学院学报JournalofJingchuUniversityofTechnology2009年7月Ju.l2009[]2009-06-17[](1964-),,,:ATmega128单片机仿真系统设计及实现汤剑锋(,363000)[]本仿真系统采用ATmega128单片机作为控制核心,利用其强大的兼容性和处理能力,以及丰富的接口等特点使整个系统的电路结构简单可靠性高ATmega128单片机仿真系统的硬件部分由电源电路复位电路晶振电路模/数转换滤波电路ISP下载接口电路JTAG仿真接口电路蜂鸣器驱动电路MAX232串口模块按键模块以及各种显示模块组成[]ATmega128;单片机;仿真系统[]TN702[]A[]1008-4657(2009)07-0025-070ATmega128AVRRISC8CMOS,ATmega1281MIPS/MHz,ATmega128:128KFlash(,RWW)4KEEPROM4KSRAM53I/O32RTC4PWM/(T/C)USARTTWI810ADC()SPIIEEE1149.1JTAG(),Atmega128Atmel,FlashSPI+,JTAG,BOOTBOOT,,Flash(IAP)Flash,FlashBOOT,/(Read-While-Write)()RISC8CPUFlash,ATmega128,ATmega128,C,,/11.1电源电路的设计1:1)USB,USB+5V,,,2512),LM7805+5V1.2复位电路的设计,,-2ATmega128,,,,:4K7VCC(R2),0.1uF(C3)D2(1N4148):1)Vcc+0.5V;2),R2(4K7),C3,,ATmega128,S1,,AT2mega1281.3晶振电路的设计3ATmega128RC,1M2M4M8M,RC,,RS232,90S,22pFATmega,,1.4AD转换滤波线路的设计4ADAD4ATmega12810ADCADC8,A8AD,ATmega128ADVCC10uH,0.1uFATmega1282.56V,AREF0.1uF:,,AVCCVCC,AREF,261.5ISP下载接口设计5ISPISP5ISP,2@5,PE0(MOSI)PE1(MISO)PB1(SCK),ISP:,,2@5PCB,ATmega1281.6JTAG仿真接口设计6JTAGJTAG6JTAG2@510K1.7MAX232串口电路设计7MAX232ATmega128,,RS232,TTL,,MAX232,,,93:5GND2RXD3TXD7,MAX23210TXD,9RXD271.8基本显示模块电路设计1)812864TS12864ST7920ST7920128*64-12,8192(16@16)128ASCII(8@16)64@256RAM(GDRAM).,2MBCGROM64@256GDRAM;,416@16;,,4823,2,(SCLK)(SID)1286482)LED9LEDLED98LED,AT2mega128I/OLED,,8550LED/0,,,D1-D4,281.9键盘电路设计1)4*4ATmega128IO,D0-3,D4-7D0-3,D4-7,AA0,,A0,D0-3,D4-7,D4-7,D0-3,BB4A4C,CVCCGND4*410104*42)1111,AT2mega1288,,,1.10蜂鸣器驱动电路B1,12122ATmega128AVRStudioICCAVRGCCAVR(WinAVR)IARAVR,ICCAVR+AVRStudioICCAVRIMAGECRAFTC,29CIDEAVRStudioATMELAVR,AVRAssemblerAVRStudioAVRProgJTAGICE,ICC,2.1显示模块的调试,,ATmega128,(SCLK)(SID)13132.2MAX232串口模块的调试,,,ATmega128MAX232,,,LED,,,ATmega128,14142.3模/数转换模块的调试/,,,,30,ADC,,MCUI/OADC2.4蜂鸣器模块的调试,,ATmega128,1,116,,1,,2,,,/0/0,,,3ATmega128,,,,,,[][1].8ATmega128()[M].:,2004.[2].VR[M].:,2007.[3],,.ATmega128\2560[M].:,2006.[4],.ATmega128[M].:,2006.[5].ATmega128[M].:,1900.[6],.AVRC[M].:,2003.[7],,.[M].2.:,2006.[:]TheDesignandRealizationofAtmega128MCUSystemSimulationTANGJian-feng(ElectronicEngineeringDepartmen,tZhangzhouInstituteofTechnology,Zhangzhou,Fujian,363000,China)Abstract:ThissystemsimulationusesAtmega128asitscontrollingcore,makingthewholesystemeticcircuitsimpleandreliablebecauseitspowerfulcompatibility,dealingabilityandrichinterface.ThehardwareofAt2mega128MCUsystemSimulationconsistspowercircui,tresetcircui,tcrestalcircui,tA/Dconverterfiltercir2cuit,ISPdownloadinterfacecircui,tJTAGsimulationinterfacecircui,tbuzzerdrivecircui,tMAZ223serialmod2ule,keymoduleandkindsofmodules.Keywords:Atmegal28;MCU;systemsimulation31