Rise and rise again until lambs become lions 授課老師：伍紹勳 課程助教：邱麟凱、江長庭

Rise and rise again until lambs become lions Outlines Up/down counter JK flip flop T flip flop Up/down counter of using T flip flops Lab

Rise and rise again until lambs become lions Up/down counter 4-bit up/down counter

Rise and rise again until lambs become lions JK flip flop JK flip flop and 74LS76

Rise and rise again until lambs become lions T flip flop Transition table Implement by a JK flip flop T T=1 Toggle T=0 Hold

Rise and rise again until lambs become lions Inputs of the 4 T flip flops – T0, T1, T2, and T3 Outputs of the 4 T flip flops – Q0, Q1, Q2 and Q3 4-bit up counter of using 4 T flip flops T0T0 T1T1 T2T2 T3T3 Q0Q0 Q1Q1 Q2Q2 Q3Q3 Clock T 0 =1 and Q 0 =1 - - > T 1 =1 T 0 =1 and Q 0 =0 - - > T 1 =0 T 0 =1 and Q 0 =1 - - > T 1 =1 T 1 =1 and Q 1 =1 - - > T 2 =1 +1

Rise and rise again until lambs become lions Inputs of the 4 T flip flops – T0, T1, T2, and T3 Outputs of the 4 T flip flops – Q0, Q1, Q2 and Q3 4-bit down counter of using 4 T flip flops T0T0 T1T1 T2T2 T3T3 Q0Q0 Q1Q1 Q2Q2 Q3Q3 Clock T 0 =1 and Q 0 =0 - - > T 1 =1 T 0 =1 and Q 0 =1 - - > T 1 =0 T 0 =1 and Q 0 =0 - - > T 1 =1 T 1 =1 and Q 1 =0 - - > T 2 =1

Rise and rise again until lambs become lions Circuit of 4-bit up/down counter Two inputs Four outputs Up = 0Up = 1 Down = 0HoldUp Count Down = 1Down CountUp Count

Rise and rise again until lambs become lions Lab Implement a up/down counter – IC ： 7404(Inverter) x (AND) x (OR) x1 7476(JK) x 2 LED x 4