A
A
R
R
-
-
B
B
1
1
3
3
2
2
0
0
U
U
s
s
e
e
r
r
’
’
s
s
G
G
u
u
i
i
d
d
e
e
III
Table of Contents
0.
PREFACE...............................................................................................................................................V
0.1
WELCOME TO THE AR-B1320 CPU BOARD.................................................................................V
0.2
BEFORE YOU USE THIS GUIDE.....................................................................................................V
0.3
RETURNING YOUR BOARD FOR SERVICE..................................................................................V
0.4
TECHNICAL SUPPORT AND USER COMMENTS..........................................................................V
0.5
ORGANIZATION..............................................................................................................................VI
0.6
STATIC ELECTRICITY PRECAUTIONS.........................................................................................VI
1.
OVERVIEW..........................................................................................................................................1-1
1.1
INTRODUCTION............................................................................................................................1-1
1.2
PACKING LIST...............................................................................................................................1-1
1.3
FEATURES....................................................................................................................................1-2
2.
SYSTEM CONTROLLER....................................................................................................................2-1
2.1
MICROPROCESSOR ....................................................................................................................2-1
2.2
DMA CONTROLLER......................................................................................................................2-1
2.3
DRAM CONFIGURATION .............................................................................................................2-2
2.4
I/O CONTROLLER.........................................................................................................................2-2
2.5
I/O PORT ADDRESS MAP............................................................................................................2-3
2.6
INTERRUPT CONTROLLER.........................................................................................................2-4
2.7
SERIAL PORTS.............................................................................................................................2-5
2.8
PARALLEL PORT..........................................................................................................................2-7
2.9
TIMER............................................................................................................................................2-9
2.10
REAL-TIME CLOCK AND NON-VOLATILE RAM....................................................................2-10
2.11
WATCHDOG TIMER................................................................................................................ 2-11
2.12
FLASH DISK.............................................................................................................................2-11
3.
SETTING THE SYSTEM .....................................................................................................................3-1
3.1
BOARD LAYOUT...........................................................................................................................3-2
3.2
CPU BASE CLOCK SELECT (JP1)...............................................................................................3-4
3.3
SWITCH SETTINGS (SW1)...........................................................................................................3-4
3.4
EXTERNAL LED HEADER (J1).....................................................................................................3-4
3.5
KEYBOARD CONNECTOR (J2)....................................................................................................3-5
3.6
RESET HEADER (J3)....................................................................................................................3-5
3.7
SPEAKER HEADER (J4)...............................................................................................................3-5
3.8
POWER CONNECTOR (J5)..........................................................................................................3-6
3.9
PRINTER CONNECTOR (CN1).....................................................................................................3-6
3.10
FLOPPY CONNECTOR (CN2)................................................................................................... 3-7
3.11
SERIAL PORT CONNECTORS (CN3, CN4 & CN5) .................................................................3-7
3.11.1
RS-232C Connectors (CN3 & CN4).......................................................................................................3-8
3.11.2
RS-485 Connector (CN5).......................................................................................................................3-8
3.11.3
RS-485 Terminator (JP2 & JP3).............................................................................................................3-9
3.12
HARD DISK CONTROLLER (CN6)............................................................................................3-9
3.13
PC/104 CONNECTOR (CN7 & CN8).......................................................................................3-10
3.13.1
64 Pin PC/104 Connector – cn8 (Bus A & B).......................................................................................3-10
3.13.2
40 Pin PC/104 Connector - CN7 (Bus C & D)......................................................................................3-10
3.13.3
PC/104 Channel Signal Description.....................................................................................................3-11
3.14
LED INDICATOR (LED1 & LED2)............................................................................................ 3-12
3.14.1
power led (led1) ...................................................................................................................................3-12
3.14.2
Status led (led2)...................................................................................................................................3-12
3.15
USING THE WATCHDOG TIMER ...........................................................................................3-13
3.15.1
WD enable register - INDEX 37H.........................................................................................................3-13
3.15.2
WD Report register - INDEX 38H.........................................................................................................3-14