0 0 0 0 x 0 0 x 0 x 1 0 x 1 0 x x 0 1

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Unformatted text preview:  0 x 1 0 x x 0 1 0 1 0 x x x x x x x x 1 1 0 x 1 0 x 1 x 0 x 1 1 1 1 1  MC=QB NC=QA       12.13)NoticethatQCisconnectedtoSI.ThismeansthatQA+=QCwhenSh=1.    DA=0  DB=1 SI=QC=0 SI=QC=1 DC=0        DD=1 Ld=1 Load Q+=D Ld=0,Sh=0 Ld=0,Sh=0 Sh=1 NoChange NoChange Shift Q+=Q Q+=Q Sh=1 Shift Ld=0,Sh=0 Ld=0,Sh=0 NoChange NoChange Q+=Q Q+=Q 12.28)a)Reset ­dominantmeansthatSR=01andSR=11dothesamething.SinceSR=11doesnotput theflip ­flopintoameta ­stablestateinthiscase,youmayallowSRtobe11.A3 ­stageup/downcounter cyclesbetween00,01,and10forwardsorbackwardsdependingontheinputU.  Q 0 0 1 1 + PossibleActions SR Q  0 Clear,PreserveState 01,11,00 Set 10 1 Clear 01,11 0 10,00 1 Set,PreserveState S 0 1 x x R x 0 1 0 U Q1 Q0 Q1+ Q0+ 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 x 0 1 1 x 1 0 0 0 1 1 1 0 1 0 0 1 1 0 0 x 1 1 1 x    S1=U Q0 +UQ0 R1=Q1 S0=UQ1 +U Q1 R0=Q0 b) Q 0 0 1 1 PossibleActions DCE Q+ 0 Clear,PreserveState 01,00,10 Set 11 1 Clear 01 0 1 Set,PreserveState 11,00,10 D CE x 0 1 1 0 1 x 0  U Q1 Q0 Q1+ Q0+ D1 CE1 D0 CE0 0 0 0 1 0 1 1 x 0 0 x 0 0 1 0 0 1 0 0 0 1 1 1 0 1 0 1 x x x x x 0 1 1 x 1 0 0 0 1 x 0 1 1 1 1 1 0 1 1 0 1 0 0 0 1 x 0 1 1 0 0 x x x x x 1 1 1 x D1=Q1  CE1=Q1+U Q0 +UQ0 D0=Q0  CE0=Q0+U Q1+UQ1          S1 R1 1 0 0 x x 1 x x 0 x 1 0 x 1 x x S0 R0 0 x x 1 1 0 x x 1 0 x 1 0 x x x...
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