单片机数字钟.doc

1 09C1 092211109 ( 20110910 ) 2 11113 22224333353.1 53.2 5444464.1 64.2.284.2.3105555135.1135.2135.3136666166.1 166.2 1777771920 3 09C1 1 AT89C51LEDSN74LS244NMAX202CPEVD5026VD5027 Lead wordsIn recent years, along with the computer in the social sectorinfiltration and large scale integrated circuit of development, theapplication of SCM is continuously to further for it has a strongfunction, small volume, low power consumption, the price ischeap, reliable and convenient use, etc, so particularly suitablefor and control the related system, more and more widely used inautomatic control, intelligent instruments, meters, dataacquisition, military products and home appliances, and otherfields, microcontroller is often as a core component to use,according to the specific hardware structure in, and the view ofthe specific application object according to the characteristics ofthe software for improvement.This paper introduces the digital clock based on single chipdesign, detailed discussion on the software to realize it from theprocess, the key is in the adjustment of the clock interrupt andthe way: inquires compare, and then to a digital clock, thestability of the accuracy and the related discussion. At the end ofthe article, and gives the way to realize the interruption of adigital clock the source program. 4This design through to a realization timing,This design through to a realization timing, This design through to a realization timing,This design through to a realization timing,the clock display, such as the function of thethe clock display, such as the function of the the clock display, such as the function of thethe clock display, such as the function of thesystem, including the design of the time with thesystem, including the design of the time with the system, including the design of the time with thesystem, including the design of the time with thetranslation data display, digital pipe display,translation data display, digital pipe display, translation data display, digital pipe display,translation data display, digital pipe display,dynamic scanning and singledynamic scanning and singledynamic scanning and singledynamic scanning and single- chip microcomputerchip microcomputer chip microcomputerchip microcomputertiming interrupts,timing interrupts, timing interrupts,timing interrupts, and technology. System byand technology. System by and technology. System byand technology. System byAT89C51, LED digital tube, buttons, transistor,AT89C51, LED digital tube, buttons, transistor, AT89C51, LED digital tube, buttons, transistor,AT89C51, LED digital tube, buttons, transistor,and SN74LS244N, MAX202CPE, VD5026, VD5027,and SN74LS244N, MAX202CPE, VD5026, VD5027, and SN74LS244N, MAX202CPE, VD5026, VD5027,and SN74LS244N, MAX202CPE, VD5026, VD5027,resistance etc. Can realize the clock, minutesresistance etc. Can realize the clock, minutes resistance etc. Can realize the clock, minutesresistance etc. Can realize the clock, minutesand seconds when the display. Also has the timeand seconds when the display. Also has the time and seconds when the display. Also has the timeand seconds when the display. Also has the timeset. After the article with a circuit diagraset. After the article with a circuit diagraset. After the article with a circuit diagraset. After the article with a circuit diagram,m, m,m,program gram list. program gram list. 2222CMOSProtel99 5 3 3.13.1 3.13.1 ATMELAT89C51AT89C518051CHMOSCHMOS8051AT89C51P2.0P2.3P2.4P2.6P1.0P1.1.P1.2P0.0P0.7,3.23-1 64 4.1 4-1 1R1100 99.1AXIAL0.42R22K 1.99K3R35.1K 5.02K4R4100 99.25R52K 1.985K6R65.1K 5.07K7R7100 99.88R82K 1.958K9R95.1K 5.06K10R10100 98.811R112K 1.974K12R125.1K 5.08K13R13200 20414R14100 99.815R152K 1.963K16R165.1K 5.05K17R17100 99.318R182K 1.964K19R195.1K 5.10K20R201K 0.982K21RN110K*89.98K 9.93K9.90K 9.91K9.98K 9.94K9.92K 9.95KSIP922C10.1uF0.89uFRAD0.223C20.88uF24C30.09uF25C40.11uF26C50.10uF27C6100uF/10V 89.7uF/10V RB.2/.428C70.1uF 0.094uF RAD0.229C8100uF/10V 89.5uF/10V RB.2/.430C930pF 29pFRAD0.231C100.1uF 0.090uF32C1130pF 29pF33D15.1V/1W 0.709VDIODE0.45.1V34D24148 0.597V 735Q18550295TO-92B36Q228937Q328938Q428239Q528040Q628741U1LG5641BH LG5641BH42U3LG5621DH LG5621DH ()43U2MAX202CPEDIP16,44U4SN74LS244NDIP2045U5AT89C51DIP4046 JP1DB9RA/M47 JP2SIP348 JP3SIP349S1SW()50S151X111.0592MXTAL112MHz4.2 ..1:AT89C2051:AT89C2051:AT89C2051:AT89C2051AT89C51AT89C51Atmel89C2051CHMOS 84kbytesFlash128 bytesRAMATMELMCS-518FlashAT89C514032/I/OP18I/O16(0HZ24MHZ)RAM/RAM 84-1 AT89C51 AT89C51XTAL1XTAL2XTAL1XTAL212MHz4-2 AT89051 AT89C51I/OAT89C