AM188ES-40KCW Datasheet, PDF (2/102 Pages) Advanced Micro Devices – High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers

PRELIMINARY
Am186ES MICROCONTROLLER BLOCK DIAGRAM
INT2/INTA0**
INT3/INTA1/IRQ
CLKOUTA _{INT6–INT4**}
CLKOUTB
INT1/SELECT
INT0 _PWD**
TMROUT0 TMROUT1
NMI
TMRIN0
TMRIN1
DRQ0** DRQ1**
V_CC
GND
X2
X1
Clock and
Power
Management
Unit
Watchdog
Timer (WDT)
Control
Registers
Interrupt
Control Unit
Control
Registers
Pulse
Width
Demod-
ulator
(PWD)
Timer Control
Unit
01
2
Max Count B
Registers
Max Count A
Registers
16-Bit Count
Registers
Control
Registers
DMA
Unit
0
1
20-Bit Source
Pointers
20-Bit Destination
Pointers
16-Bit Count
Registers
Control
Registers
RES
PIO
Unit
PIO31–
PIO0*
ARDY
SRDY
S2–S0
DT/R
DEN/DS
HOLD
HLDA
S6/LOCK/
CLKDIV2
UZI
Control
Registers
Refresh
Control
Unit
PSRAM
Control
Unit
Control
Registers
Bus
Interface
Unit
Execution
Unit
Chip-Select
Unit
Control
Registers
Asynchronous
Serial Port 0
Asynchronous
Serial Port 1
RD
A19–A0
AD15–AD0
WHB
WLB
WR
BHE/ADEN
ALE
LCS/ONCE0
PCS6/A2
MCS3/RFSH
PCS5/A1
MCS2–MCS0 PCS3–PCS0**
UCS/ONCE1
TXD0
RXD0
RTS0/RTR0
CTS0/ENRX0
TXD1
RXD1
RTS1/RTR1**
CTS1/ENRX1**
Notes:
*All PIO signals are shared with other physical pins. See the pin descriptions beginning on page 27 and Table 2 on page 34 for
information on shared functions.
** PWD, INT5, INT6, RTS1/RTR1, and CTS1/ENRX1 are multiplexed with INT2/INTA0, DRQ0, DRQ1, PCS3, and PCS2 respec-
tively. See the pin descriptions beginning on page 27.
2
Am186/188ES and Am186/188ESLV Microcontrollers