P R E L I M I N A R Y
LOGIC SYMBOL—Am188ES MICROCONTROLLER
RES
DRQ1/INT6
DRQ0/INT5
X1
X2
Clocks
CLKOUTA
CLKOUTB
*
*
INT4
INT3/INTA1/IRQ
INT2/INTA0/PWD
INT1/SELECT
INT0
Reset Control and
Interrupt Service
*
20
8
A19–A0
AO15–AO8
AD7–AD0
Address and
Address/Data Buses
NMI
8
*
*
S6/LOCK/CLKDIV2
UZI
PCS6/A2
*
*
PCS5/A1
PCS3/RTS1/RTR1
PCS2/CTS1/ENRX1
PCS1–PCS0
*
*
ALE
3
S2–S0
HOLD
HLDA
RD
2
3
Memory and
Peripheral Control
*
LCS/ONCE0
MCS3/RFSH
MCS2–MCS0
UCS/ONCE1
*
*
WR
Bus Control
*
*
DT/R
DEN/DS
ARDY
SRDY
RFSH2/ADEN
WB
DRQ1/INT6
DRQ0/INT5
*
*
*
DMA Control
*
*
TXD0
RXD0
*
*
TMRIN0
TMROUT0
TMRIN1
CTS0/ENRX0
RTS0/RTR0
*
*
Timer Control
*
*
Asynchronous
Serial Port Control
*
*
TMROUT1
TXD1
RXD1
32
shared
PCS2/CTS1/ENRX1
PCS3/RTS1/RTR1
*
*
Programmable
I/O Control
**
PIO32–PIO0
Notes:
* These signals are the normal function of a pin that can be used as a PIO. See Pin Descriptions beginning on page 27 and
Table 2 on page 34 for information on shared function.
** All PIO signals are shared with other physical pins.
26
Am186/188ES and Am186/188ESLV Microcontrollers