Logic Experiment 9

老師：伍紹勳助教：江長庭 鄭仲傑

Equipment

• IC ： 221Ω 電阻 x 4 、 7476 x 2 、 7400(NAND) x 1 、 LED x 4 、微動開關 *1

Review

• Edge Trigger– Positive-Edge-Trigger– Negative-Edge-Trigger

Trigger

Input

Output

Positive edgeNegative edge

SR Latch - Debouncing

微動開關

GNDR S

JK flip-flop (JK FF)

Upper Counter working process

B

C

A

D

Clock

1 0

1 1

1 0

01

7476 (JK FF)

• Preset: Setting FF asynchronously

• Clear: Clear FF asynchronously