P R E L I M I N A R Y
LOGIC SYMBOL—Am186EM MICROCONTROLLER
RES
INT4
X1
*
*
X2
Clocks
CLKOUTA
CLKOUTB
INT3/INTA1/IRQ
INT2/INTA0
INT1/SELECT
INT0
Reset Control and
Interrupt Service
20
16
A19–A0
*
NMI
Address and
AD15–AD0
Address/Data Buses
S6/CLKDIV2
UZI
*
*
PCS6/A2
PCS5/A1
*
*
*
4
3
PCS3–PCS0
LCS/ONCE0
MCS3/RFSH
MCS2–MCS0
UCS/ONCE1
ALE
3
Memory and
Peripheral Control
S2–S0
HOLD
HLDA
RD
*
*
WR
DT/R
DEN
Bus Control
*
*
ARDY
SRDY
BHE/ADEN
WHB
WLB
*
2
*
DRQ1–DRQ0
DMA Control
TMRIN0
*
*
TXD
RXD
*
*
Asynchronous
Serial Port Control
TMROUT0
TMRIN1
Timer Control
*
*
TMROUT1
2
SDEN1–SDEN0
SCLK
*
*
*
32
shared
Synchronous
Serial Port Control
Programmable
I/O Control
PIO32–PIO0
**
SDATA
Notes:
* These signals are the normal function of a pin that can be used as a PIO. See the pin descriptions beginning on page 25 and
Table 2 on page 30 for information on shared function.
** All PIO signals are shared with other physical pins.
Am186/188EM and Am186/188EMLV Microcontrollers
23
AMD [ AMD ]
