Transcript 上課投影片

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
Negative edge
Positive edge
SR Latch - Debouncing
微動開關
R
GND
S
JK flip-flop (JK FF)
Upper Counter working process
11
1
Clock
A
B
C
D
0
1
0
0
1
7476 (JK FF)
• Preset: Setting FF asynchronously
• Clear: Clear FF asynchronously