AM186EM Datasheet, PDF (1/1 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

Am186EM MICROCONTROLLER BLOCK DIAGRAM
INT2/INTA0
INT3/INTA1/IRQ
CLKOUTA
INT4
CLKOUTB
INT1/SELECT
INT0
NMI
TMROUT0 TMROUT1
TMRIN0
TMRIN1
DRQ0 DRQ1
V_CC
GND
X2
X1
Clock and
Power
Management
Unit
Control
Registers
Interrupt
Control Unit
Control
Registers
Timer Control
Unit
0 1 (WDT) 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
HOLD
HLDA
S6/
CLKDIV2
UZI
Control
Registers
Refresh
Control
Unit
PSRAM
Control
Unit
Control
Registers
Bus
Interface
Unit
Execution
Unit
Chip-Select
Unit
Control
Registers
Asynchronous
TXD
Serial Port
RXD
Control
Registers
Synchronous Serial
Interface
RD
A19–A0
AD15–AD0
WHB
WLB
WR
BHE/ADEN
ALE
SCLK
SDATA
LCS/ONCE0
PCS6/A2 SDEN0 SDEN1
MCS3/RFSH
PCS5/A1
MCS2–MCS0
PCS3–PCS0
UCS/ONCE1
Note:
* All PIO signals are shared with other physical pins. See the pin descriptions beginning on page 24 and Table 2
on page 28 for information on shared function.