IA186EM_04 Datasheet, PDF (59/133 Pages) InnovASIC, Inc – 8/16-Bit Microcontrollers

IA186EM/IA188EM
8/16-BIT Microcontrollers
Data Sheet
As of Production Version -03
Programmable I/O (PIO)
32 pins are programmable as I/O signals. The following tables list these pins with their pin name and PIO
number, first in PIO numerical order, then in pin name alphabetical order. Programming a pin as a PIO
should only be performed if the normal pin function is not required as the normal function is disabled and
no longer has any affect on the pin. A PIO pin can be programmed as an input or output with or without
either a weak pull-up or pull-down, or as an open-drain output. Following a power-on reset, the PIO pins
have default status as shown in the following tables.
PIO
No.
0
1
2
3
4
5
6
7⁽¹⁾
8⁽¹⁾
9⁽¹⁾
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26^(1,2)
27
28
29^(1,2)
30
31
Associated Pin
tmrin1
tmrout1
pcs6_n/a2
pcs5_n/a1
dt/r_n
den_n
srdy
a17
a18
a19
tmrout0
tmrin0
drq0
drq1
mcs0_n
mcs1_n
pcs0_n
pcs1_n
pcs2_n
pcs3_n
sclk
sdata
sden0
sden1
mcs2_n
mcs3_n/rfsh_n
uzi_n
txd
rxd
s6/clkdiv2
int4
int2
Power-On Reset
Status
Input with pull-up
Input with pull-down
Input with pull-up
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Input with pull-down
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Associated Pin
a17
a18
a19
den_n/ds_n
drq0
drq1
dt/r_n
int2/
int4
mcs0_n
mcs1_n
mcs2_n
mcs3_n/rfsh_n
pcs0_n
pcs1_n
pcs2_n
pcs3_n
pcs5_n/a1
pcs6_n/a2
rxd
s6/clkdiv2
sclk
sdata
sden0
sden1
srdy
tmrin0
tmrin1
tmrout0
tmrout1
txd
uzi_n
PIO No.
7
8
9
5
12
13
4
31
30
14
15
24
25
16
17
18
19
3
2
28
29
20
21
22
23
6
11
0
10
1
27
26
Power-On Reset
Status
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Input with pull-up
Input with pull-up
Normal operation⁽³⁾
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up^(1,2)
Input with pull-up
Input with pull-up
Input with pull-up
Input with pull-up
Normal operation⁽⁴⁾
Input with pull-up
Input with pull-up
Input with pull-down
Input with pull-down
Input with pull-up
Input with pull-up
NOTES
These notes apply to both tables:
1. Emulators use these pins and also s2_n-s0_n, res_n, nmi, clkouta, bhe_n ale, ad15-ad0, and a15-a0.
2. If bhe_n/aden_n (IA186EM) or rfsh_n/aden_n (IA188M) is held low during power-on reset, these
pins will revert to normal operation.
3. Input with pull-up option available when used as PIO.
4. Input with pull-down option available when used as PIO.
These default status setting may be changed as desired.
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