P R E L I M I N A R Y
LOGIC SYMBOL—Am188EM MICROCONTROLLER
RES
INT4
X1
X2
*
*
Clocks
CLKOUTA
CLKOUTB
INT3/INTA1/IRQ
INT2/INTA0
INT1/SELECT
INT0
Reset Control and
Interrupt Service
*
20
8
A19–A0
NMI
AO15–AO8
Address and
Address/Data Buses
8
AD7–AD0
PCS6/A2
PCS5/A1
*
*
*
*
*
S6/CLKDIV2
UZI
4
3
PCS3–PCS0
LCS/ONCE0
MCS3/RFSH
MCS2–MCS0
UCS/ONCE1
Memory and
Peripheral Control
ALE
3
*
*
S2–S0
HOLD
HLDA
RD
WR
Bus Control
DT/R
DEN
ARDY
*
*
SRDY
*
RFSH2/ADEN
WB
2
DMA Control
*
DRQ1–DRQ0
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
PIO31–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.
24
Am186/188EM and Am186/188EMLV Microcontrollers
AMD [ AMD ]
