03.03.2021 Views

Testes e exames

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12. O registo apresentado na figura 4 é um contador em anel.

PR

D Q

Q0

PR

Q1

PR

Q2

PR

Q3

D Q

D Q

D Q

CLK

CL

Q

CL

Q

figura 4

CL

Q

Q

CL

RESET

CLEAR

Indique o estado de cada flip-flop após a ativação de RESET ̅̅̅̅̅̅̅̅̅ e nos impulsos seguintes:

Impulso CLK Q0 Q1 Q2 Q3

0 (após RESET ̅̅̅̅̅̅̅̅̅)

1

2

3

Total:

200 pontos

Pág. 6 de 6

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