AMD Am186TMER ユーザーズマニュアル
System Overview
3-11
Table 3-2
PIO Pin Assignments—Alphabetic Listing
Notes:
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.
Associated Pin
PIO No.
Power-On Reset Status
A17
(1)
7
Normal operation
(3)
A18
(1)
8
Normal operation
(3)
A19
(1)
9
Normal operation
(3)
DEN
5
Normal operation
(3)
DRQ0
12
Input with pullup
DRQ1
13
Input with pullup
DT/R
4
Normal operation
(3)
INT2
31
Input with pullup
INT4
30
Input with pullup
MCS0
14
Input with pullup
MCS1
15
Input with pullup
MCS2
24
Input with pullup
MCS3/RFSH
25
Input with pullup
PCS0
16
Input with pullup
PCS1
17
Input with pullup
PCS2
18
Input with pullup
PCS3
19
Input with pullup
PCS5/A1
3
Input with pullup
PCS6/A2
2
Input with pullup
RXD
28
Input with pullup
S6/CLKSEL1
(1,2)
29
Input with pullup
SCLK
20
Input with pullup
SDATA
21
Input with pullup
SDEN0
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
27
Input with pullup
UZI/CLKSEL2
(1,2)
26
Input with pullup