w78l812a Winbond Electronics Corp America, w78l812a Datasheet - Page 4

• Manufacturer Part Number: w78l812a
• Description: 8-bit Mcu Series 80c51-based
• Manufacturer: Winbond Electronics Corp America

3. PIN CONFIGURATIONS
A14CTRL,INT0, P3.2
A13CTRL,TXD, P3.1
OECTRL,INT1, P3.3
A9CTRL,RXD, P3.0
INT7,P1.5
INT8,P1.6
INT9,P1.7
T0, P3.4
T1, P3.5
P4.3
RST
44-Pin PLCC
7
8
9
10
11
12
13
14
15
16
17
N
18
,
T
6
I
P
1
.
4
P
3
.
6
,
/
W
R
6 5 4 3
C
E
, ,
/
19
N
T
5
,
I
P
1
.
3
P
3
.
7
,
/
R
D
/
O
E
20
40-Pin DIP
N
T
,
4
P
1
.
2
X
T
A
L
2
I
21
N
T
,
3
E
X
,
P
1
.
1
X
T
A
L
1
I
T
2
22
N
T
,
I
2
T
2
,
P
1
.
0
V
S
S
2 1 44 43 42 41
23
P
4
.
2
P
4
.
0
24
V
D
D
P
2
.
0
,
A
8
25
P
2
.
1
,
A
9
A
D
0
,
P
0
.
0
A14CTRL,INT0, P3.2
A13CTR,LTXD, P3.1
OECTRL,INT1, P3.3
A9CTRL,RXD, P3.0
26
P
2
.
2
,
A
1
0
A
D
1
,
P
0
.
1
INT3,T2EX, P1.1
27
P
2
.
3
,
A
1
1
A
D
2
,
P
0
.
2
INT2,,T2, P1.0
CE,WR, P3.6
OE,RD, P3.7
28
40
A
D
3
,
P
0
.
3
P
2
.
4
,
A
1
2
39
38
37
36
35
34
33
32
31
30
29
INT4,P1.2
INT5,P1.3
INT6,P1.4
INT7,P1.5
INT8,P1.6
INT9,P1.7
T0, P3.4
T1, P3.5
XTAL2
XTAL1
VSS
RST
P4.1
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA,VPP
ALE
PSEN,P4.6
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
- 4 -
A14CTRL,INT0, P3.2
A13CTRL,TXD, P3.1
OECTRL,INT1, P3.3
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A9CTRL,RXD, P3.0
VDD
P0.1, AD1
P0.2, AD2
P0.3, AD3
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA,VPP
ALE
PSEN,P4.6
P2.7, A15
P2.6, A14
P2.4, A12
P2.3, A11
P2.2, A10
P2.1, A9
P2.0, A8
P0.0, AD0
P2.5, A13
INT7,P1.5
INT8,P1.6
INT9,P1.7
T0, P3.4
T1, P3.5
44-Pin PQFP
W78LE812/W78L812A
P4.3
RST
1
2
3
4
5
6
7
8
9
10
11
12
N
,
I
T
6
44 43 42 41
P
3
.
6
,
/
W
R
P
1
.
4
C
E
, ,
/
13
N
T
,
P
3
.
7
,
/
R
D
/
O
I
5
E
P
1
.
3
14
X
T
A
L
2
N
T
,
P
1
.
2
I
4
15
X
T
A
L
1
N
T
,
I
3
T
2
E
X
,
P
1
.
1
16
40 39 38 37 36 35
N
T
2
,
V
S
S
I
T
2
,
P
1
.
0
17
P
4
.
0
P
4
.
2
18
P
2
.
0
,
A
8
V
D
D
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
A
D
3
,
P
0
.
3
PSEN,P4.6
P4.1
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA,VPP
ALE
P2.7, A15
P2.6, A14
P2.5, A13