IA186EB/IA188EB
8-Bit/16-Bit Microcontrollers
Data Sheet
July 10, 2011
2.2
IA186EB Pin/Signal Descriptions
Descriptions of the pin and signal functions for the IA186EB microcontroller are provided in
Table 7.
Several of the IA186EB pins have different functions depending on the operating mode of the
device. Each of the different signals supported by a pin is listed and defined in Table 7—
indexed alphabetically in the first column of the table. Additionally, the name of the pin
associated with the signal as well as the pin numbers for the PLCC, LQFP, and PQFP packages
are provided in the ―Pin‖ column. Signals not used in a specific package type are designated
―NA.‖
Table 7. IA186EB Pin/Signal Descriptions
Pin
PLCC
80
Signal
a16
(output
only)
a17
(output
only)
a18
(output
only)
a19
ad0
ad1
ad2
ad3
ad4
ad5
ad6
ad7
ad8
ad9
ad10
ad11
ad12
ad13
ad14
ad15
Name
a16
LQFP
66
PQFP
29
a17
81
67
30
a18
82
68
31
Description
address
Bits [16–19]. Input/Output. These pins
provide the four most-significant bits of the
Address Bus. During the address portion of the
IA186EB bus cycle, Address Bits [16–19] are
presented on the bus and can be latched using
the ale signal (see table entry). During the data
portion of the IA186EB bus cycle, these lines
are driven to a logic 0.
a19/once_n
ad0
ad1
ad2
ad3
ad4
ad5
ad6
ad7
ad8
ad9
ad10
ad11
ad12
ad13
ad14
ad15
83
61
66
68
70
72
74
76
78
62
67
69
71
73
75
77
79
69
47
52
54
56
58
60
62
64
48
53
55
57
59
61
63
65
32
10
15
17
19
21
23
25
27
11
16
18
20
22
24
26
28
address/data
Bits [0–15]. Input/Output. These
pins provide the multiplexed Address Bus and
Data Bus. During the address portion of the
IA186EB bus cycle, Address Bits [0–15] are
presented on the bus and can be latched using
the ale signal (see next table entry). During the
data portion of the IA186EB bus cycle, 8- or
16-bit data are present on these lines.
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