AM186EM Datasheet, PDF (30/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

PRELIMINARY
Table 2. Numeric PIO Pin Assignments
PIO No Associated Pin Power-On Reset Status
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
10 TMROUT0
11 TMRIN0
12 DRQ0
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⁾
Input with pulldown
Input with pullup
Input with pullup
13 DRQ1
14 MCS0
15 MCS1
16 PCS0
17 PCS1
Input with pullup
Input with pullup
Input with pullup
Input with pullup
Input with pullup
18 PCS2
19 PCS3
20 SCLK
21 SDATA
Input with pullup
Input with pullup
Input with pullup
Input with pullup
22 SDEN0
23 SDEN1
24 MCS2
25 MCS3/RFSH
26^(1,2) UZI
Input with pulldown
Input with pulldown
Input with pullup
Input with pullup
Input with pullup
27 TXD
28 RXD
29^(1,2) S6/CLKDIV2
30 INT4
Input with pullup
Input with pullup
Input with pullup
Input with pullup
31 INT2
Input with pullup
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 (186) or
RFSH2/ADEN (188) 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.
Table 3. Alphabetic PIO Pin Assignments
Associated Pin
A17⁽¹⁾
A18⁽¹⁾
A19⁽¹⁾
DEN
PIO No Power-On Reset Status
7 Normal operation⁽³⁾
8 Normal operation⁽³⁾
9 Normal operation⁽³⁾
5 Normal operation⁽³⁾
DRQ0
DRQ1
DT/R
INT2
INT4
12 Input with pullup
13 Input with pullup
4 Normal operation⁽³⁾
31 Input with pullup
30 Input with pullup
MCS0
MCS1
MCS2
MCS3/RFSH
14 Input with pullup
15 Input with pullup
24 Input with pullup
25 Input with pullup
PCS0
PCS1
PCS2
PCS3
PCS5/A1
16 Input with pullup
17 Input with pullup
18 Input with pullup
19 Input with pullup
3 Input with pullup
PCS6/A2
RXD
S6/CLKDIV2^(1,2)
SCLK
2 Input with pullup
28 Input with pullup
29 Input with pullup
20 Input with pullup
SDATA
SDEN0
SDEN1
SRDY
TMRIN0
21 Input with pullup
22 Input with pulldown
23 Input with pulldown
6 Normal operation⁽⁴⁾
11 Input with pullup
TMRIN1
TMROUT0
TMROUT1
TXD
UZI^(1,2)
0 Input with pullup
10 Input with pulldown
1 Input with pulldown
27 Input with pullup
26 Input with pullup
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 (186) or
RFSH2/ADEN (188) 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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Am186/188EM and Am186/188EMLV Microcontrollers