Question

3. Moore State Machine Design [25 points A sequential circuit has two inputs (X1, X2) and one output (Z). The output remains a constant value unless one of the following input sequences occurs: The input sequence X1, X2 01, 1 causes the output to become 0. The input sequence X, X2 10, 11 causes the output to become 1 The input sequence X1, X2 10, 01 causes the output to change value. Provide a state transition table and state graph for this circuit

Answer 1

State diagram

бо, 1 XIK2 XIX2 S0 во, 10 о1 XIX2 бo/ ll,o1 xix2 о о) S2 оо, 110 XIX2хIx2 XIк2 XIX2 XIx 11 о1 SS $3 XIX2 о1

State Ansignment Table Binary Value anigned Stote So 1 S 2 S3 S4 SS AUnused

State Tranaition Table input PS Output N S P 2 PI QO XIX 2 ооо O 1 O O оо X 1 1 0 O O O Zn хх X хх* Zn 1 1оо 1 ххX - INF X о 2 <е о оооэе O

P S input Output X1 X2 X хX х ооо Zn 1 o 1 1 I Zn 1O O 1 Zn 1 ХXX 1 1 X o-Nx

PS : present state NS : next state

In the State trangition table whene nt in net output ^tate Zn is present out pur given in ques tion he z value Yemainu conulant until aiven input Seuences accuv at inpuh So if XIX2 O , 00 then Zn preaunt output F XI X2 ol,II then XI X2 10, 11 hen 2nt= X x2 0,D1 then 2n+ Zn So output 2n deends on prescnt auput Zn Lohich depends on Cuent State Since the FsM ioa Moore machine