IA186EB Datasheet, PDF (25/85 Pages) InnovASIC, Inc – 8-Bit/16-Bit Microcontrollers

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
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
a17
a18
Pin
PLCC LQFP
80
66
81
67
82
68
PQFP
29
30
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 83
69
32
ad0
ad1
ad2
ad3
ad4
ad5
ad6
ad7
ad8
ad9
ad10
ad11
ad12
ad13
ad14
ad15
61
47
10 address/data Bits [0–15]. Input/Output. These
66
52
15 pins provide the multiplexed Address Bus and
68
54
17 ^{Data Bus. During the address portion of the}
70
56
19 ^{IA186EB bus cycle, Address Bits [0–15] are}
72
58
21 ^{presented on the bus and can be latched using}
74
60
23 ^{the ale signal (see next table entry). During the}
76
78
62
64
25
27
data portion of the IA186EB bus cycle, 8- or
16-bit data are present on these lines.
62
48
11
67
53
16
69
55
18
71
57
20
73
59
22
75
61
24
77
63
26
79
65
28
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