AM186ER-25KCW AMD [Advanced Micro Devices], AM186ER-25KCW Datasheet - Page 3

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

Am188™ER MICROCONTROLLER BLOCK DIAGRAM
Notes:
* 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.
CLKSEL1
CLKSEL2
S1/IMDIS
S0/SREN
GND
RES
V
HOLD
ARDY
SRDY
HLDA
DT/R
CC
DEN
UZI/
S6/
S2
A19–A0
AO15–AO8
CLKOUTA
X1
Management
Timer (WDT)
Clock and
Watchdog
Registers
Registers
X2
AD7–AD0
Control
Control
Power
CLKOUTB
Interface
INT3/INTA1/IRQ
Bus
Unit
ALE
Am186
INT4
Refresh
Control
RFSH2/ADEN
Unit
WR
Control Unit
INT2/INTA0
WB
Interrupt
Registers
TM
Control
RD
ER and Am188
INT1/SELECT
32 Kbyte
(32K x 8)
SRAM
INT0
LCS/ONCE0
NMI
MCS3/RFSH
Execution
Unit
TM
MCS2–MCS0
PSRAM
Control
ER Microcontrollers Data Sheet
Unit
Chip-Select
TMRIN0
UCS/ONCE1
Max Count B
0
Registers
Unit
Timer Control
Registers
Max Count A
TMROUT0
16-Bit Count
Control
Registers
Registers
Registers
1 (WDT)
Control
Unit
PCS3–PCS0
TMRIN1
PCS5/A1
PCS6/A2
TMROUT1
2
SCLK
Synchronous Serial
SDEN0 SDEN1
20-Bit Destination
Registers
Interface
Control
DRQ0
20-Bit Source
Asynchronous
16-Bit Count
0
Registers
Serial Port
Registers
Pointers
Pointers
Registers
Control
DMA
Control
Unit
DRQ1
1
SDATA
Unit
PIO
PIO31–
PIO0*
TXD
RXD
3