AMD Am186TMER ユーザーズマニュアル
Features and Performance
1-5
Figure 1-2
Am188ER Microcontroller Block Diagram
Notes:
1. All PIO signals are shared with other physical pins. See the pin descriptions in Chapter 3 and
Table 3-1 on page 3-10 for information on shared functions.
20-Bit Source
Pointers
Interrupt
Control Unit
Timer Control
Unit
DMA
Unit
Bus
Interface
Unit
32 Kbyte
RAM
(32K x 8)
Chip-Select
Unit
Clock and
Power
Management
Unit
Control
Registers
16-Bit Count
Registers
Max Count A
Registers
16-Bit Count
Registers
20-Bit Destination
Pointers
Control
Registers
Control
Registers
Control
Registers
0
1 (WDT)
2
0
1
Max Count B
Registers
Refresh
Control
Unit
Control
Registers
Control
Registers
Control
Registers
CLKOUTB
CLKOUTA
INT4
INT3/INTA1/IRQ
INT2/INTA0
INT1/SELECT
INT0
TMROUT0
TMROUT1
DRQ0
DRQ1
V
CC
GND
TMRIN0
TMRIN1
Asynchronous
Serial Port
Synchronous Serial
Interface
TXD
RXD
SCLK
SDATA
SDEN0 SDEN1
NMI
A19–A0
AD7–AD0
ALE
WR
WB
RD
RES
LCS/ONCE0
MCS2–MCS0
PCS6/A2
PCS3–PCS0
PCS5/A1
UCS/ONCE1
X2
X1
Control
Registers
PSRAM
Control
Unit
MCS3/RFSH
PIO
Unit
PIO31–
PIO0
1
Co
ntro
l
Re
g
is
te
rs
AO15–AO8
RFSH2/ADEN
Execution
Unit
ARDY
SRDY
DT/R
DEN
HOLD
HLDA
S6/
UZI/
CLKSEL2
CLKSEL1
S1/IMDIS
S0/SREN
S2