多功能數(shù)字鐘設(shè)計原理圖

1、多功能數(shù)字鐘設(shè)計原理圖脈沖發(fā)生電路kluXIANSHICLK；：.3.0S7.OB3.OC：3.OD3.OE3.OF3.OAI3.Oinsti24L：huu：:：epUTPUTrpiPiT疔I斤門訐KO2.-KO3.：lK04.；l.KO5：.KO5KO7.；lKijy.；lfrequency48MHz1KHz1Hz512hzinstCLKA3.OKIh.2-J.LIh.Jh.4EJ.U=12hzF.i1Khz.JJ.JJK5BEEPK06.JNOTPhnkr-l23-U3.LIl4J.0l5:J.uLt：.U.BEEP.W:X:zUcompare.Ku?：*.KOS：iCLKN43.OK：7

2、NO3.OK8N13.ON23.ON33.OZHH3.OZH3.OZMH3.OZM3.OZS3.ONHH3.ONH3.ONMH3.ONM3.ONS3.OBEEF1uFuFTWZO3.OZ13.OZ23.OZ33.OZ43.OZ53.ONO3.ON13.ON23.ON33.ON43.0lOIJT03.0OUT-13.0OUT23.J：iOIJT33.I：IOUT43.J：iOIJT53.i：iCLKKO-1KIKO2K2KOSK3KO4K4KOSK5KO6K6KO7K7KOSK8（二）分頻計數(shù)模塊512Hz1H珅1片74161構(gòu)成模1弁1片74161構(gòu)成模1片74161構(gòu)成模1248分頻*1片7

3、4161構(gòu)成模31000分頻41000分頻lKHz+J；1片74161構(gòu)成模121片7474構(gòu)成模占1MHz2分頻亠（三）48分頻原理圖7416174161CCV0LDNABQACQEDQCENTQENPRC(-0CLRNCLKCLKinstCOUNTERa4、a1Xa2Ka3LDNENTENPCLRNQAQBQGQDRCObOb1b2b3CLK；CCTblX一CLKinstlCOUNTEROUTPUT48FENPIN2分頻模塊原理圖CLK1PRN1D01CLRN1Qn1CLK1QN2PRN2Qn2D2QN2CLRN2CLK7474j-instDFLIPFLOPSOUTPUTCLK2FENPI

4、NIVCCT1000分頻模塊clkOhvcCtOUTPUTa3.OOUTPUTc3.OOUTPUTb3.OOUTPUT1000FENb0c0NAND2NAND2IPINa0NAND2a3b3c31nst6irst37416LDN7416irstll7416LDNLDNCLKENTa0AXalca2a3ENPRCOCLRNCLKirstcounterb0ENTi1c0blTb2C乂b3ENPRCOENTc1c2c3ENPRCOCLRNCLRNCLKCLKCOUNTERcounter秒1片74161構(gòu)廉模3lHz+J星期*1片741&1構(gòu)成模F1片741&1構(gòu)成模12J1片74161構(gòu)成模7,從開

5、始記1片74161,前片為（k1時模皿前片為2時模4（四）分秒計數(shù)模塊a3inst5ICCJCFD：-NGLDNABQACQBDQCENTQDENPRCCCLRNCIK74161Ga3-xCOUNTERa0-:a2jxCR74161inst21s.一一一OUTPUT-fa30OUTPUTLb30OUTPUTL/OUTBQACQBDQCENTQDENPRCCCLRNCLKLDNAGCOUNTERinst3b0blb2b3n(K)KldN一（八）校時電路（九）報時電路十）顯示電路f計屮時屮電屮24位輸岀L路d由4片74151組成24選4數(shù)數(shù)碼管的段位譯碼屮器7447譯碼屮器74138EAAAAA數(shù)碼管段碼a數(shù)碼S.&碼屮GD.GVCCAOABOBCOCDODLTNOERBINOFBINOGRBONS0C1a心一Y3K亠：S2_j斗:斗斗S6：S7.A30珂3