AM186ER-25KCW AMD [Advanced Micro Devices], AM186ER-25KCW Datasheet - Page 2

• Manufacturer Part Number: AM186ER-25KCW
• Description: High-Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers with RAM
• Manufacturer: AMD [Advanced Micro Devices]

Am186™ER MICROCONTROLLER BLOCK DIAGRAM
Note:
* All PIO signals are shared with other physical pins. See the pin descriptions beginning on page 30 and Table 3 on page 36 for
information on shared functions.
2
CLKSEL2
CLKSEL1
S1/IMDIS
S0/SREN
GND
RES
V
HOLD
ARDY
SRDY
HLDA
DT/R
CC
DEN
UZI/
S6/
S2
A19–A0
AD15–AD0
CLKOUTA
X1
Timer (WDT)
Management
Clock and
Watchdog
Registers
X2
Registers
Control
Control
Power
Unit
CLKOUTB
Interface
ALE
INT3/INTA1/IRQ
Unit
Bus
BHE/ADEN
Am186
WR
INT4
Refresh
Control
WLB
Unit
Control Unit
Registers
INT2/INTA0
Interrupt
WHB
Control
TM
RD
ER and Am188
INT1/SELECT
(16K x 16)
32 Kbyte
SRAM
INT0
NMI
LCS/ONCE0
MCS3/RFSH
Execution
Unit
TM
MCS2–MCS0
ER Microcontrollers Data Sheet
PSRAM
Control
Unit
Chip-Select
TMRIN0
Max Count B
UCS/ONCE1
0
Registers
Unit
Timer Control
TMROUT0
Registers
Max Count A
16-Bit Count
Control
Registers
1 (WDT)
Registers
Registers
Control
Unit
PCS3–PCS0
TMRIN1
PCS5/A1
PCS6/A2
TMROUT1
2
SCLK
Synchronous Serial
SDEN0 SDEN1
20-Bit Destination
Registers
Interface
DRQ0
Control
20-Bit Source
Asynchronous
16-Bit Count
0
Registers
Registers
Serial Port
Pointers
Pointers
Control
Registers
DMA
Unit
Control
DRQ1
SDATA
1
Unit
PIO
PIO31–
PIO0*
TXD
RXD