Bài T p Bài 3ậ
Bài 4: LCD
Bài 4: LCD
D 5
D 6
D 7
R S
R w
E N
EN Rw RS
R S T
9
X T A L 2
1 8
X T A L 1
1 9
G N D
2 0
PSEN 2 9
A L E / P R O G 3 0
EA/VPP 3 1
V C C 4 0
P 1 . 0
1
P 1 . 1
2
P 1 . 2
3
P 1 . 3
4
P 1 . 4
5
P 1 . 5
6
P 1 . 6
7
P 1 . 7
8
P 2 . 0 / A 8 2 1
P 2 . 1 / A 9 2 2
P 2 . 2 / A 1 0 2 3
P 2 . 3 / A 1 1 2 4
P 2 . 4 / A 1 2 2 5
P 2 . 5 / A 1 3 2 6
P 2 . 6 / A 1 4 2 7
P 2 . 7 / A 1 5 2 8
P 3 . 0 / R X D
1 0
P 3 . 1 / T X D
1 1
P 3 . 2 / I N T 0
1 2
P 3 . 3 / I N T 1
1 3
P 3 . 4 / T 0
1 4
P 3 . 5 / T 1
1 5
P 3 . 6 / W R
1 6
P 3 . 7 / R D
1 7
P 0 . 0 / A D 0 3 9
P 0 . 1 / A D 1 3 8
P 0 . 2 / A D 2 3 7
P 0 . 3 / A D 3 3 6
P 0 . 4 / A D 4 3 5
P 0 . 5 / A D 5 3 4
P 0 . 6 / A D 6 3 3
P 0 . 7 / A D 7 3 2
U 1
A T 8 9 C 5 1
12
3
4
5
6
7
8
9
1 0
R 1 1 0 K
5 V
V C C
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
J 1
L C D
R 2
5 K
Y 1
1 2 M h z
C 1
33p
C 2
3 3 p
R 3
1 0 K
5 V
LCD16x02
+
C 3
C A P A C I T O R P O L
5 V5 V
C 6
104
D 0
D 1
D 2
D 3
D 4
#include <REGX52.H>
#include <string.h>
#define LCDdata P2
sbit BF=P2^7;
sbit RS=P3^7;
sbit RW=P3^6;
sbit EN=P3^5;
Bài 4: LCD
void wait(void)
{
LCDdata=0xff;
while(BF){EN=0;delay(100);EN=1;delay(100);}
RW=0;
}
Bài 4: LCD