P R E L I M I N A R Y
Table 2. Numeric PIO Pin Designations Table 3. Alphabetic PIO Pin Designations
PIO No
0
Associated Pin
TMRIN1
Power-On Reset Status
Input with pullup
Associated Pin
A17(1)
A18(1)
PIO No Power-On Reset Status
7
Normal operation(3)
Normal operation(3)
Normal operation(3)
Input with pullup
Normal operation(3)
Input with pullup
Input with pullup
Normal operation(3)
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(4)
Input with pullup
Input with pullup
Input with pulldown
Input with pulldown
Input with pullup
Input with pullup
Input with pullup
1
TMROUT1
PCS6/A2
PCS5/A1
DT/R
Input with pulldown
Input with pullup
8
2
A19(1)
9
3
Input with pullup
CTS0/ENRX0
DEN/DS
21
5
4
Normal operation(3)
Normal operation(3)
Normal operation(4)
Normal operation(3)
Normal operation(3)
Normal operation(3)
Input with pulldown
Input with pullup
5
DEN/DS
SRDY
DRQ0/INT5
DRQ1/INT6
DT/R
12
13
4
6
7(1)
8(1)
9(1)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
A17
A18
INT2/INTA0/PWD
INT4
31
30
14
15
24
25
16
17
18
19
3
A19
TMROUT0
TMRIN0
DRQ0/INT5
DRQ1/INT6
MCS0
MCS0
MCS1/UCAS
MCS2/LCAS
MCS3/RAS1
PCS0
Input with pullup
Input with pullup
Input with pullup
MCS1/UCAS
PCS0
Input with pullup
PCS1
Input with pullup
PCS2/CTS1/ENRX1
PCS3/RTS1/RTR1
PCS5/A1
PCS6/A2
RTS0/RTR0
RXD0
PCS1
Input with pullup
PCS2/CTS1/ENRX1 Input with pullup
PCS3/RTS1/RTR1
RTS0/RTR0
CTS0/ENRX0
TXD0
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
2
20
23
28
29
6
RXD1
S6/CLKDIV2(1,2)
RXD0
MCS2/LCAS
MCS3/RAS1
SRDY
TMRIN0
11
0
26(1,2) UZI
TMRIN1
27
TXD1
TMROUT0
TMROUT1
TXD0
10
1
28
RXD1
29(1,2) S6/CLKDIV2
22
27
26
30
31
INT4
TXD1
UZI(1,2)
INT2/INTA0/PWD
Notes:
The following notes apply to both tables.
1. These pins are used by many 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 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.
Am186ED/EDLV Microcontrollers
29
AMD [ AMD ]
