Version 4
SHEET 1 1620 680
WIRE -48 -112 -112 -112
WIRE -112 -80 -112 -112
WIRE -112 32 -112 0
WIRE -64 112 -112 112
WIRE -112 144 -112 112
WIRE -112 256 -112 224
WIRE -64 336 -112 336
WIRE -112 384 -112 336
WIRE -112 496 -112 464
FLAG -112 256 0
FLAG -64 112 a1
FLAG -112 496 0
FLAG -64 336 3b_data
FLAG -112 32 0
FLAG -48 -112 clk
SYMBOL bv -112 128 R0
SYMATTR InstName B1
SYMATTR Value V=int(time/{tbit})
SYMBOL bv -112 368 R0
SYMATTR InstName B2
SYMATTR Value V=table(V(a1),0,0, 1,1, 2,0, 3,1, 4,1, 5,0,  6,0, 7,0, 8,1, 9,1, 10,1, 11,1, 12,1, 13,0, 14,0, 15,1, 16,1, 17,0, 18,1, 19,0, 20,0, 21,0, 22,1, 23,1)
SYMBOL voltage -112 -96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value PULSE(0 1 0 1p 1p {tbit/2} {tbit} {tstop/tbit})
TEXT -448 176 Left 2 !.tran 0 {tstop} 0 {tstep}
TEXT -440 48 Left 2 !.param tstep=1p
TEXT -440 16 Left 2 !.param tstop=24*tbit
TEXT -440 80 Left 2 !.param tbit=10n