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AD Bus
AD0
1
AD1
3
AD2
6
AD3
8
AD4
12
AD5
14
AD6
16
AD7
18
AD8 (A8)
2
AD9 (A9)
5
AD10 (A10)
7
AD11 (A11)
9
AD12 (A12)
13
AD13 (A13)
15
AD14 (A14)
17
AD15 (A15)
19
A16 S3
21
A17 S4
22
A18 S5
23
A19 S6
24
NOTE
Pin names in parentheses apply to the 80C186EA 80L188EA
1
AD0
2
AD8 (A8)
3
AD1
4
N C
5
AD9 (A9)
6
AD2
7
AD10 (A10)
8
AD3
9
AD11 (A11)
10
V
CC
11
V
CC
12
AD4
13
AD12 (A12)
14
AD5
15
AD13 (A13)
16
AD6
17
AD14 (A14)
18
AD7
19
AD15 (A15)
20
V
CC
NOTE
Pin names in parentheses apply to the 80C186EA 80L188EA
Table 8 SQFP Pin Functions with Package Location
Bus Control
ALE QS0
29
BHE (RFSH)
26
S0
40
S1
39
S2
38
RD QSMD
28
WR QS1
27
ARDY
37
SRDY
44
DEN
56
DT R
54
LOCK
45
HOLD
43
HLDA
42
No Connection
N C
4
N C
25
N C
35
N C
72
Table 9 SQFP Pin Locations with Pin Names
21
A16 S3
22
A17 S4
23
A18 S5
24
A19 S6
25
N C
26
BHE (RFSH)
27
WR QS1
28
RD QSMD
29
ALE QS0
30
V
SS
31
V
SS
32
X1
33
X2
34
RESET
35
N C
36
CLKOUT
37
ARDY
38
S2
39
S1
40
S0
80C186EA 80C188EA 80L186EA 80L188EA
Processor Control
RESIN
73
RESOUT
34
CLKIN
32
OSCOUT
33
CLKOUT
36
TEST BUSY
46
NMI
47
INT0
48
INT1 SELECT
49
INT2 INTA0
52
INT3 INTA1
53
PDTMR
55
Power and Ground
V
10
CC
V
11
CC
V
20
CC
V
50
CC
V
51
CC
V
61
CC
V
30
SS
V
31
SS
V
41
SS
V
70
SS
V
80
SS
41
V
SS
42
HLDA
43
HOLD
44
SRDY
45
LOCK
46
TEST BUSY
47
NMI
48
INT0
49
INT1 SELECT
50
V
CC
51
V
CC
52
INT2 INTA0
53
INT3 INTA1
54
DT R
55
PDTMR
56
DEN
57
MCS0 PEREQ
58
MCS1 ERROR
59
MCS2
60
MCS3 NPS
I O
UCS
62
LCS
63
MCS0 PEREQ
57
MCS1 ERROR
58
MCS2
59
MCS3 NPS
60
PCS0
71
PCS1
69
PCS2
68
PCS3
67
PCS4
66
PCS5 A1
65
PCS6 A2
64
TMR IN 0
77
TMR IN 1
76
TMR OUT 0
75
TMR OUT 1
74
DRQ0
79
DRQ1
78
61
V
CC
62
UCS
63
LCS
64
PCS6 A2
65
PCS5 A1
66
PCS4
67
PCS3
68
PCS2
69
PCS1
70
V
SS
71
PCS0
72
N C
73
RES
74
TMR OUT 1
75
TMR OUT 0
76
TMR IN 1
77
TMR IN 0
78
DRQ1
79
DRQ0
80
V
SS
19
19
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