w78c31b Winbond Electronics Corp America, w78c31b Datasheet - Page 2

• Manufacturer Part Number: w78c31b
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

PIN CONFIGURATIONS
INT0, P3.2
INT1, P3.3
RXD, P3.0
TXD, P3.1
40-Pin DIP (W78C31B)
44-Pin PLCC (W78C31BP)
T0, P3.4
T1, P3.5
P1.5
P1.6
P1.7
RST
NC
7
8
9
10
11
12
13
14
15
16
17
18
P
1
.
4
P
3
.
6
,
/
W
R
6
19
P
3
.
7
,
/
R
D
P
1
.
3
5
20
P
1
.
2
X
T
A
L
2
4
21
P
1
.
1
3
X
T
A
L
1
22
V
S
S
P
1
.
0
2
23
N
C
N
C
1 44 43 42 41
24
V
C
C
P
2
.
0
,
A
8
25
P
2
.
1
,
A
9
A
D
0
,
P
0
.
0
26
P
2
.
2
,
A
1
0
A
D
1
,
P
0
.
1
27
A
D
2
,
P
0
.
2
P
2
.
3
,
A
1
1
INT0, P3.2
INT1, P3.3
28
RXD, P3.0
TXD, P3.1
WR, P3.6
40
A
D
3
,
P
0
.
3
P
2
.
4
,
A
1
2
RD, P3.7
39
38
37
36
35
34
33
32
31
30
29
T0, P3.4
T1, P3.5
XTAL2
XTAL1
VSS
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RST
P1.0
P1.1
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA
NC
ALE
PSEN
P2.7, A15
P2.6, A14
P2.5, A13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
- 2 -
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
INT0, P3.2
RXD, P3.0
INT1, P3.3
TXD, P3.1
T0, P3.4
T1, P3.5
VCC
P0.1, AD1
P0.2, AD2
P0.3, AD3
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA
ALE
PSEN
P2.7, A15
P2.6, A14
P2.5, A13
P2.4, A12
P2.3, A11
P2.2, A10
P2.1, A9
P2.0, A8
P0.0, AD0
P1.5
P1.6
P1.7
RST
NC
44-Pin QFP/TQFP (W78C31BF/W78C31BM)
1
2
3
4
5
6
7
8
9
10
11
12
P
1
.
4
44 43 42 41
P
3
.
6
,
/
W
R
13
P
3
.
7
,
/
R
D
P
1
.
3
14
X
T
A
L
2
P
1
.
2
15
X
T
A
L
1
P
1
.
1
16
40 39 38 37 36 35
V
S
S
P
1
.
0
17
N
C
N
C
18
P
2
.
0
,
A
8
V
C
C
19
P
2
.
1
,
A
9
A
D
0
,
P
0
.
0
20
P
2
.
2
,
A
1
0
A
D
1
,
P
0
.
1
21
P
2
.
3
,
A
1
1
A
D
2
,
P
0
.
2
22
34
33
32
31
30
29
28
27
26
25
24
23
P
2
.
4
,
A
1
2
W78C31B
A
D
3
,
P
0
.
3
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA
NC
ALE
PSEN
P2.7, A15
P2.6, A14
P2.5, A13