reporte contador 9 s

7/24/2019 Reporte Contador 9 S

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MOD 9 SYNCHRONOUS UP COUNTER

DIGITAL ELECTRONICS

CARLOS ALBERTO OROZCO MUOZcarlos.orozco_!"#o$%a&l.co%

UNI'ERSIDAD DE GUANA(UATOCAMPUS IRAPUATO)SALAMANCA

DEM YURIRIA

*+,NO'EMBER,*+-


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ABSTRACT

The purpose of the practice was to build a counter circuit module 9 synchronous using J-

K flip-flops, to understand how the Moore machines (synchronous) works and see the

difference with the Mealy (asynchronous) ones of the preious practice!

INTRODUCTION

"n the theory of computation, a Moore machine is a finite-state machinewhose output

alues are determined solely by its currentstate! This is in contrast to a Mealy machine,

whose output alues are determined both by its current state and by the alues of its

inputs! The Moore machine is named after#dward $! Moore, who presented the concept

in a %9&' paper, edanken-e*perimentson +euential Machines!

O/01c$&21s

- uild a synchronous counter module 9 using flip-flops .-k in a breadboard!- /nderstand the reaction of flip-flops .-k to the clock signal!
https://en.wikipedia.org/wiki/Theory_of_computationhttps://en.wikipedia.org/wiki/Finite-state_machinehttps://en.wikipedia.org/wiki/Finite-state_machinehttps://en.wikipedia.org/wiki/State_(computer_science)https://en.wikipedia.org/wiki/State_(computer_science)https://en.wikipedia.org/wiki/Mealy_machinehttps://en.wikipedia.org/wiki/Mealy_machinehttps://en.wikipedia.org/wiki/Edward_F._Moorehttps://en.wikipedia.org/wiki/Edward_F._Moorehttps://en.wikipedia.org/wiki/Thought_experimenthttps://en.wikipedia.org/wiki/Thought_experimenthttps://en.wikipedia.org/wiki/Finite-state_machinehttps://en.wikipedia.org/wiki/State_(computer_science)https://en.wikipedia.org/wiki/Mealy_machinehttps://en.wikipedia.org/wiki/Edward_F._Moorehttps://en.wikipedia.org/wiki/Thought_experimenthttps://en.wikipedia.org/wiki/Theory_of_computation


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METHODOLOGY

/sing two 01ls0' integrated circuits (containing two JK flip-flops with reset and preset)

was assembled in a breadboard the circuit shown in the $igure 2%3, using a clock signal

generated by a oscillator bistable &&& to a low freuency of %45, this to appreciate the

change between one state to another !

Figure 1: Circuit diagram of the synchronous mod. 9 counter.

The 6 output of each flip-flop JK represent the bits of the number, the first 6 (67) is the

M+, a 8# was connected to each output to see that number in binary representation!The main difference between the synchronous and asynchronous circuits is that in the

synchronous there is only a one clock signal and is the same for each flip-flop!

The method to obtain the inputs for each .-k of the flip-flops was using the transition

states diagram of the .-k flip-flop

Figure 2: Diagram transition of states


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!

:ith the diagram was possible make the truth table for each input JK!

6

7

6

;

6

%

6< 67=

%

6;=

%

6%=

%

6


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The counter works correctly, starting to count from % to the 9, the number was in

representation binary using the four leds!

Figure 4: Circuit built in breadboard.

Figure 5: Testing the counter.

CONCLUSIONS

The difference between the synchronous and the asynchronous counters is not much, only

the way that are designed! :ith this practice is understood a little better how the .-k flip-

flop and the synchronous circuits works!

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