8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
Table 5. 8XC251SA/SB/SP/SQ PLCC/DIP Pin Assignments Arranged by Functional Category
Address & Data
Name
AD0/P0.0
AD1/P0.1
AD2/P0.2
AD3/P0.3
AD4/P0.4
AD5/P0.5
AD6/P0.6
AD7/P0.7
A8/P2.0
A9/P2.1
A10/P2.2
A11/P2.3
A12/P2.4
A13/P2.5
A14/P2.6
A15/P2.7
P3.7/RD#/A16
P1.7/CEX4/A17/WCLK
PLCC
43
42
41
40
39
38
37
36
24
25
26
27
28
29
30
31
19
9
DIP
39
38
37
36
35
34
33
32
21
22
23
24
25
26
27
28
17
8
V
CC
V
CC
2
V
SS
V
SS
1
V
SS
2
Processor Control
Name
P3.2/INT0#
P3.3/INT1#
EA#/V
PP
RST
XTAL1
XTAL2
PLCC
14
15
35
10
21
20
DIP
12
13
31
9
18
19
Bus Control & Status
Name
P3.6/WR#
P3.7/RD#/A16
ALE/PROG#
PSEN#
PLCC
18
19
33
32
DIP
16
17
30
29
EA#/V
PP
Power & Ground
Name
PLCC
44
12
22
1
23, 34
35
31
20
DIP
40
P1.0/T2
P1.1/T2EX
P1.2/ECI
P1.3/CEX0
P1.4/CEX1
P1.5/CEX2
P1.6/CEX3/WAIT#
P1.7/CEX4/A17/WCLK
P3.0/RXD
P3.1/TXD
P3.4/T0
P3.5/T1
Input/Output
Name
PLCC
2
3
4
5
6
7
8
9
11
13
16
17
DIP
1
2
3
4
5
6
7
8
10
11
14
15
PRELIMINARY
9
INTEL [ INTEL CORPORATION ]
