利用PIC12C508单片机来实现加密狗技术

-37-PIC12C508:MicrochipPIC12C508,PIC12C508:,(),25,,,;,,,,,,,,,,PC,,,,1.,,,,,,,25D,8,5,4,(LPT1)1,(2BCH)74LS374,,CMOS,15mA,20mA(2BDH),5:ACK:,,ACKBUSY:,,PE:,SLCT:,ERROR:,(2BEH)1PIC12C508©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:AUTOFDXT:,SLCTIN:,,INIT:,,:,;+5V;,;,,,,,,,,2.PIC12C5082.1PIC12C50893CL46EEPROM,Microchip,PIC12C5088CMOS,512,2.25.5V,2mA(4MHz,5V),,4MHzRCMCCR,,PIC12C508,I/O6,,,PIC12C508DIP293LC46CMOS1kEEPROM,2.0V,1mA,EEPROM40,93LC46DIP3PIC12C508,93LC46,PIC12C508,,2.24D7DVcc,15mA,PIC12C5082mA,93LC461mA,,3mA,D7,D7=1GP0GP193LC46CLK,DIDO,EEPROM(),D293LC46CS,EEPROM,GP4SLCTIN,,SLCTIN,,,GP5,,,42PIC12C508©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(m0)PC,F1(m1),m1=F1(m0),(m2)93LC46(m1)F2,m2=F2(m1),,,,PCPCEEPROM,PCPCD7=1,D2=1,EEPROM,;,,GP4SLCTIN,SLCTIN=1,GP2,GP3;PCD0D1,(m0);,F1(m1)EEPROM,,(m2);,GP5ACKPCEEPROM,;PC,D1ACK(m2),(m0)(m2)PC,,,,F1(m),(m)EEPROM,EEPROM(m1),(m2),PC;PC3.,,:3.1+5V,,(),,,,3.2,,3.3,,,,,,I/O,1...,1989102.MicrochipPIC12C5XXDATASHEET.3.MicrochipNON-VOLATILEMEMORYPRODUCTSDATABOOK.4.MicrochipTechnologyInc.,PIC16/17Micro2controllerDataBook.:,:0208753504287583987:02087583987:990811©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.