IA186XL/IA188XL
16-Bit Microcontrollers
Data Sheet
July 6, 2011
2.2
IA186XL Pin/Signal Descriptions
Descriptions of the pin and signal functions for the IA186XL microcontroller are provided in
Table 7.
Several of the IA186XL 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, PQFP, and LQFP packages are provided in
the “Pin” column. Signals not used in a specific package type are designated “NA.”
Table 7. IA186XL Pin/Signal Descriptions
Pin
Signal
a1
a2
a16
a17
a18
a19
Name
pcs5_n/a1
pcs6_n/a2
a16/s3
a17/s4
a18/s5
PLCC
31
32
68
67
PQFP
LQFP
65
64
21
22
Description
Latched address bit a1. Output.
Latched address bit a2. Output.
address bits 16–19. Output. These pins
provide the four most-significant bits of the
Address Bus during T1 only. During T2, T3, TW
and T4 they provide bus status.
48
47
3
4
5
66
65
23
24
a19/s6
6
ad0
ad1
ad2
ad3
ad4
ad5
ad6
ad7
ad0
ad1
ad2
ad3
ad4
ad5
ad6
ad7
ad8
17
15
13
11
8
6
4
2
16
14
12
10
7
5
3
1
64
66
68
70
74
76
78
80
65
67
69
71
75
77
79
1
1
3
6
address/data bits 0–15. Input/Output. These
pins provide the multiplexed Address Bus and
Data Bus. During the address portion of the
IA186XL 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 bus cycle, data
are present on these lines.
8
12
14
16
18
2
5
7
9
13
15
17
19
ad8
ad9
ad9
ad10
ad11
ad12
ad13
ad14
ad15
ad10
ad11
ad12
ad13
ad14
ad15
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