P R E L I M I N A R Y
TABLE OF CONTENTS
Distinctive Characteristics ............................................................................................................ 1
General Description ..................................................................................................................... 1
Am186EM Microcontroller Block Diagram .................................................................................... 2
Am188EM Microcontroller Block Diagram .................................................................................... 3
Ordering Information .................................................................................................................... 4
Related AMD Products ................................................................................................................ 8
Key Features and Benefits ........................................................................................................ 10
TQFP Connection Diagrams and Pinouts .................................................................................. 11
PQFP Connection Diagrams and Pinouts ................................................................................. 17
Logic Symbol—Am186EM Microcontroller ................................................................................ 23
Logic Symbol—Am188EM Microcontroller ................................................................................ 24
Pin Descriptions
Pins that Are Used by Emulators ................................................................................... 25
A19–A0 ........................................................................................................................... 25
AD7–AD0 ....................................................................................................................... 25
AD15–AD8 (Am186EM Microcontroller) ......................................................................... 25
AO15–AO8 (Am188EM Microcontroller) ........................................................................ 25
ALE ................................................................................................................................ 25
ARDY ............................................................................................................................. 25
BHE/ADEN (Am186EM Microcontroller Only) ............................................................... 26
CLKOUTA ...................................................................................................................... 26
CLKOUTB ...................................................................................................................... 26
DEN/PIO5 ...................................................................................................................... 26
DRQ1–DRQ0.................................................................................................................. 26
DT/R/PIO4 ..................................................................................................................... 26
GND ............................................................................................................................... 27
HLDA ............................................................................................................................. 27
HOLD ............................................................................................................................. 27
INT0 ............................................................................................................................... 27
INT1/SELECT ................................................................................................................ 27
INT2/INTA0/PIO31 ......................................................................................................... 27
INT3/INTA1/IRQ ............................................................................................................. 27
INT4/PIO30 .................................................................................................................... 28
LCS/ONCE0 ................................................................................................................... 28
MCS3/RFSH/PIO25 ....................................................................................................... 28
MCS2–MCS0.................................................................................................................. 28
NMI ................................................................................................................................ 28
PCS3–PCS0 ................................................................................................................... 29
PCS5/A1/PIO3 ............................................................................................................... 29
PCS6/A2/PIO2 ............................................................................................................... 29
PIO31–PIO0 (Shared) .................................................................................................... 29
RD .................................................................................................................................. 31
RES ................................................................................................................................ 31
RFSH2/ADEN (Am188EM Microcontroller Only) ........................................................... 31
RXD/PIO28 .................................................................................................................... 31
S2–S0 ............................................................................................................................ 31
S6/CLKDIV2/PIO29 ....................................................................................................... 31
SCLK/PIO20 .................................................................................................................. 32
SDATA/PIO21 ................................................................................................................ 32
SDEN1/PIO23, SDEN0/PIO22 ....................................................................................... 32
SRDY/PIO6 .................................................................................................................... 32
TMRIN0/PIO11 .............................................................................................................. 32
Am186/188EM and Am186/188EMLV Microcontrollers
5
AMD [ AMD ]
