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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
