IA186ES/IA188ES
Data Sheet
8-Bit/16-Bit Microcontrollers
November 15, 2011
input or output with or without a weak pull-up or pull-down. A PIO pin can be also programmed
as an open-drain output. Each PIO pin regains default status after a POR.
Table 15. Default Status of PIO Pins at Reset
PIO
No.
Power-On Reset
Status
Input with pullup
Input with pulldown
Input with pullup
Power-On Reset
Status
Associated Pin
tmrin1
tmrout1
pcs6_n/a2
pcs5_n/a1
dt/r_n
den_n/ds_n
srdy
a17
a18
a19
tmrout0
Associated Pin
A
7
8
9
21
5
12
13
4
31
30
14
16
24
25
16
17
18
19
3
a
0
1
2
3
4
5
6
a17
a18
a19
Normal operation
Normal operation
Normal operation
Input with pullup
Normal operation
Input with pullup
Input with pullup
Normal operation
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Normal operation
Input with pullup
Input with pullup
a
a
a
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
cts0_n/enrx0_n
den_n/ds_n
drq0/int5
drq1/int6
dt/r_n
int2/inta0_n/pwd
int4
mcs0_n
mcs1_n
mcs2_n
mcs3_n/rfsh_n
pcs0_n
pcs1_n
pcs2_n/cts1_n/enrx1_n
pcs3_n/rts1_n/rtr1_n
pcs5_n/a1
pcs6_n/a2
rts0_n/rtr0_n
rxd0
a
a
a
a
a
b
a
7
8
9
b
a
b
a
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Input with pulldown
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
tmrin0
drq0/int5
drq1/int6
mcs0_n
mcs1_n
pcs0_n
pcs1_n
pcs2_n/cts1_n/enrx1_n
pcs3_n/rts1_n/rtr1_n
rts0_n/rtr0_n
cts0_n/enrx0_n
txd0
rxd0
mcs2_n
mcs3_n/rfsh_n
uzi_n
txd1
2
20
23
28
29
6
11
0
10
1
rxd1
s6/lock_n/clkdiv2
srdy
timrin0
tmrin1
tmrout0
d
25
b,c
26
27
28
Input with pulldown
Input with pulldown
Input with pullup
Input with pullup
Input with pullup
rxd1
s6/lock_n/clkdiv2
int4
tmrout1
b,c
29
txd0
txd1
22
27
26
30
31
int2/inta0_n/pwd
uzi_n
a
b
c
Input with pullup when used as PIO.
Emulators use these pins and also s2_n–s0_n, res_n, nmi, clkouta, bhe_n, ale, ad15–ad0, and a16–a0.
If bhe_n/aden_n (IA186ES) or rfsh_n/aden_n (IA188ES) is held low during POR, these pins will revert to normal
operation.
d
Input with pulldown option available when used as PIO.
®
IA211050902-19
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