Preliminary W78E51B
PIN CONFIGURATIONS
40-Pin DIP (W78E51B)
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RST
RXD, P3.0
TXD, P3.1
INT0, P3.2
INT1, P3.3
T0, P3.4
T1, P3.5
WR, P3.6
RD, P3.7
XTAL2
XTAL1
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VDD
P0.0, AD0
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
44-Pin PLCC (W78E51BP)
/
I
A
N
T
D
0
3
,
,
P P P P P P
P
1 1 1 1 1 4 V 0
. . . . . . D .
4 3 2 1 0 2 D 0
44-Pin QFP (W78E51BF)
/
I
A
N
D
T
0
3
,
,
P P P P P P
P
1 1 1 1 1 4 V 0
. . . . . . D .
4 3 2 1 0 2 D 0
A
D
1
,
P
0
.
1
A
D
2
,
P
0
.
2
A
D
3
,
P
0
.
3
A
D
1
,
P
0
.
1
A
D
2
,
P
0
.
2
A
D
3
,
P
0
.
3
P1.5
P1.6
P1.7
RST
RXD, P3.0
INT2, P4.3
TXD, P3.1
INT0, P3.2
INT1, P3.3
T0, P3.4
T1, P3.5
6 5 4 3 2 1 44 43 42 41 40
7
39
8
38
9
37
10
36
11
35
12
34
13
33
14
32
15
31
16
30
17
29
18 19 20 21 22 23 24 25 26 27 28
P
3
.
6
,
/
W
R
P
3
.
7
,
/
R
D
X
T
A
L
2
X V P P
T S 4 2
A S . .
L
0 0
1
,
A
8
P
2
.
1
,
A
9
P
2
.
2
,
A
1
0
P
2
.
3
,
A
1
1
P
2
.
4
,
A
1
2
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA
P4.1
ALE
PSEN
P2.7, A15
P2.6, A14
P2.5, A13
P1.5
P1.6
P1.7
RST
RXD, P3.0
INT2, P4.3
TXD, P3.1
INT0, P3.2
INT1, P3.3
T0, P3.4
T1, P3.5
1
2
44 43 42 41 40 39 38 37 36 35 34
33
32
31
3
30
4
29
5
28
6
27
7
8
26
9
25
10
24
11
23
12 13 14 15 16 17 18 19 20 21 22
P
3
.
6
,
/
W
R
P
3
.
7
,
/
R
D
X
T
A
L
2
X V P P
T S 4 2
A S . .
L
0 0
1
,
A
8
P
2
.
1
,
A
9
P
2
.
2
,
A
1
0
P
2
.
3
,
A
1
1
P
2
.
4
,
A
1
2
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA
P4.1
ALE
PSEN
P2.7, A15
P2.6, A14
P2.5, A13
-2-
WINBOND [ WINBOND ]
