AMD Am186TMER ユーザーズマニュアル
System Overview
3-10
Table 3-1
PIO Pin Assignments—Numeric 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.
PIO No.
Associated Pin
Power-On Reset Status
0
TMRIN1
Input with pullup
1
TMROUT1
Input with pulldown
2
PCS6/A2
Input with pullup
3
PCS5/A1
Input with pullup
4
DT/R
Normal operation
(3)
5
DEN
Normal operation
(3)
6
SRDY
Normal operation
(4)
7
(1)
A17
Normal operation
(3)
8
(1)
A18
Normal operation
(3)
9
(1)
A19
Normal operation
(3)
10
TMROUT0
Input with pulldown
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
SDEN1
Input with pulldown
24
MCS2
Input with pullup
25
MCS3/RFSH
Input with pullup
26
(1,2)
UZI/CLKSEL2
Input with pullup
27
TXD
Input with pullup
28
RXD
Input with pullup
29
(1,2)
S6/CLKSEL1
Input with pullup
30
INT4
Input with pullup
31
INT2
Input with pullup