AM186 Datasheet, PDF (36/112 Pages) Advanced Micro Devices – High-Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers with RAM

Table 3. Numeric PIO Pin Assignments
Table 4. Alphabetic PIO Pin Assignments
PIO No. Associated Pin
0 TMRIN1
1 TMROUT1
2 PCS6/A2
3 PCS5/A1
4 DT/R
5 DEN
6 SRDY
7⁽¹⁾ A17
8⁽¹⁾ A18
9⁽¹⁾ A19
Power-On Reset Status
Input with pullup
Input with pulldown
Input with pullup
Input with pullup
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽⁴⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Normal operation⁽³⁾
Associated Pin
A17⁽¹⁾
A18⁽¹⁾
A19⁽¹⁾
DEN
DRQ0
DRQ1
DT/R
INT2
INT4
MCS0
PIO No. Power-On Reset Status
7 Normal operation⁽³⁾
8 Normal operation⁽³⁾
9 Normal operation⁽³⁾
5 Normal operation⁽³⁾
12 Input with pullup
13 Input with pullup
4 Normal operation⁽³⁾
31 Input with pullup
30 Input with pullup
14 Input with pullup
10 TMROUT0
Input with pulldown
MCS1
15 Input with pullup
11 TMRIN0
Input with pullup
12 DRQ0
Input with pullup
13 DRQ1
Input with pullup
14 MCS0
Input with pullup
15 MCS1
Input with pullup
16 PCS0
Input with pullup
17 PCS1
Input with pullup
18 PCS2
Input with pullup
19 PCS3
Input with pullup
20 SCLK
Input with pullup
21 SDATA
Input with pullup
22 SDEN0
Input with pulldown
23
24
25
26^(1,2)
27
28
29^(1,2)
30
31
SDEN1
MCS2
MCS3/RFSH
UZI/CLKSEL2
TXD
R ^RXD
S6/CLKSEL1
INT4
D^INT2
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
MCS2
24 Input with pullup
MCS3/RFSH
PCS0
PCS1
PCS2
PCS3
T PCS5/A1
PCS6/A2
RXD
F ^{S6/CLKSEL1(1,2)}
SCLK
SDATA
A^SDEN0
25 Input with pullup
16 Input with pullup
17 Input with pullup
18 Input with pullup
19 Input with pullup
3 Input with pullup
2 Input with pullup
28 Input with pullup
29 Input with pullup
20 Input with pullup
21 Input with pullup
22 Input with pulldown
SDEN1
23 Input with pulldown
SRDY
6 Normal operation⁽⁴⁾
TMRIN0
11 Input with pullup
TMRIN1
0 Input with pullup
TMROUT0
10 Input with pulldown
TMROUT1
1 Input with pulldown
TXD
UZI/CLKSEL2^(1,2)
27 Input with pullup
26 Input with pullup
Notes:
Notes:
1. These pins are used by emulators. (Emulators also use
S2–S0, RES, NMI, CLKOUTA, BHE, ALE, AD15–AD0,
and A16–A0.)
1. These pins are used by emulators. (Emulators also use
S2–S0, RES, NMI, CLKOUTA, BHE, ALE, AD15–AD0,
and A16–A0.)
2. These pins revert to normal operation if BHE/ADEN
(Am186ER microcontroller) or RFSH2/ADEN (Am188ER
microcontroller) is held Low during power-on reset.
3. When used as a PIO, input with pullup option available.
4. When used as a PIO, input with pulldown option available.
2. These pins revert to normal operation if BHE/ADEN
(Am186ER microcontroller) or RFSH2/ADEN (Am188ER
microcontroller) is held Low during power-on reset.
3. When used as a PIO, input with pullup option available.
4. When used as a PIO, input with pulldown option available.
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Am186^TMER and Am188^TMER Microcontrollers Data Sheet