电子时钟优质PPT.ppt
- 文档编号:14133843
- 上传时间:2022-10-19
- 格式:PPT
- 页数:15
- 大小:53.50KB
电子时钟优质PPT.ppt
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SEG_SEL:
OUTSTD_LOGIC_VECTOR(2DOWNTO0);
SEG_DA:
OUTSTD_LOGIC_VECTOR(7DOWNTO0);
ENDTIMER;
ARCHITECTUREADOOFTIMERISCOMPONENTCNT10PORT(CLK:
RST:
CIN:
CNT_VAL:
OUTSTD_LOGIC_VECTOR(3DOWNTO0);
COUT:
OUTSTD_LOGIC);
ENDCOMPONENT;
COMPONENTCNT6PORT(CLK:
COMPONENTCNT2PORT(CLK:
INOUTSTD_LOGIC_VECTOR(3DOWNTO0);
COMPONENTCNT4PORT(CLK:
SIGNALS_BUF1,S_BUF2,S_BUF3,S_BUF4:
STD_LOGIC_VECTOR(3DOWNTO0);
SIGNALS_BUF5,S_BUF6,S_BUF7,S_BUF8:
SIGNALS_CNT:
STD_LOGIC_VECTOR(2DOWNTO0);
SIGNALS_TEMP:
SIGNALCOUT:
STD_LOGIC_VECTOR(5DOWNTO0);
SIGNALCLK:
STD_LOGIC;
BEGIN,PROCESS(CLK3)BEGINIFCLK3EVENTANDCLK3=1THENCLK=NOTCLK;
ENDIF;
ENDPROCESS;
PROCESS(CLK,RST1)BEGINIFCLKEVENTANDCLK=1THENIFRST1=1THENS_CNT=000;
ELSES_CNT=S_CNT+1;
S_SEL=S_CNT;
S_BUF3=1111;
S_BUF6=1111;
PROCESS(S_CNT,S_BUF1,S_BUF2,S_BUF3,S_BUF4,S_BUF5,S_BUF6,S_BUF7,S_BUF8)BEGINCASES_CNTISWHEN000=S_TEMPS_TEMPS_TEMPS_TEMPS_TEMPS_TEMPS_TEMPS_TEMPNULL;
ENDCASE;
PROCESS(SEG_TEMP)BEGINCASESEG_TEMPISWHEN0000=SEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DASEG_DA=x00;
U1:
CNT10PORTMAP(CLK=CLK5,RST=RST1,CNT_VAL=S_BUF1,COUT=COUT(0),CIN=1);
U2:
CNT6PORTMAP(CLK=CLK5,RST=RST1,CNT_VAL=S_BUF2,COUT=COUT
(1),CIN=COUT(0);
U3:
CNT10PORTMAP(CLK=CLK5,RST=RST1,CNT_VAL=S_BUF4,COUT=COUT
(2),CIN=COUT
(1);
U4:
CNT6PORTMAP(CLK=CLK5,RST=RST1,CNT_VAL=S_BUF5,COUT=COUT(3),CIN=COUT
(2);
U5:
CNT4PORTMAP(CLK=CLK5,RST=RST1,CNT_VAL=S_BUF7,COUT=COUT(4),CIN=COUT(3);
U6:
CNT2PORTMAP(CLK=CLK5,RST=RST1,CNT_VAL=S_BUF8,COUT=COUT(5),CIN=COUT(4);
ENDADO;
LIBRARYIEEE;
ENTITYCNT10ISPORT(CLK:
ENDCNT10;
ARCHITECTUREBEHAVEOFCNT10ISSIGNALCNT_T:
BEGINPROCESS(CLK)BEGINIFRST=1THENCNT_T=0000;
ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T/=9THENCNT_T=CNT_T+1;
ELSECNT_T=0000;
ELSECNT_T=CNT_T;
COUT=1WHENCNT_T=9ANDCIN=1ELSE0;
CNT_VAL=CNT_T;
ENDBEHAVE;
ENTITYcnt6ISPORT(CLK:
ENDCNT6;
ARCHITECTUREADO2OFCNT6ISSIGNALCNT_T:
SIGNALCOUTD:
BEGINPROCESS(CLK,RST)BEGINIFRST=1THENCNT_T=0000;
ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T5THENCNT_T=CNT_T+1;
ELSECNT_T=x0;
COUT=1WHENCNT_T=5ANDCIN=1ELSE0;
ENDADO2;
ENTITYCNT2ISPORT(CLK:
ENDCNT2;
ARCHITECTUREADO3OFCNT2ISSIGNALCNT_T:
ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T1THENCNT_T=CNT_T+1;
COUT=1WHENCNT_T=1ANDCIN=1ELSE0;
ENDADO3;
ENTITYCNT4ISPORT(CLK:
ENDCNT4;
ARCHITECTUREBEHAVEOFCNT4ISSIGNALCNT_T:
ELSIFCLKEVENTANDCLK=1THENIFCIN=1THENIFCNT_T3THENCNT_T=CNT_T+1;
COUT=1WHENCNT_T=3ANDCIN=1ELSE0;
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- 关 键 词:
- 电子 时钟