Question

3. Construct a modulo-5 parallel (synchronous) down counter using master-slave T flip- flops. The counter should count in the sequence 0-4-3-2-1-0 and then back to 4, counting continuously. The counter stages are x,y and z, where z is the most significant bit. The Qoutputs are Qx, Qy and Qu. The T-inputs of the three stages are Tx, Ty and Tz. Use Karnaugh map method (truth table for Tinputs followed by K-map) to determine each of the T-inputs (not the short-cut method). Draw the timing diagrams of the output of each stage with respect to a 50/50 dock input.

Answer 1

Present State 000 Next State 0 0 001 0 0 Oo - 1 100 000 oot 01 0 o 1 010 0 1 1 1 کلام حاج 100 Ty = 5 g + 6 0 + 0 0 0 Ty = 0, 0, 0, & qöydy T2 = 0, ax

waveform:

டேடட ட டடடடடட 129 பட ட ட 40 5p ப ட 60 70 80 90, 100, - clk q[2:0] reset x p