Arcom SBC104, Technical Manual

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Introduction
The SBC104 is a PC-compatible 386SX/486SXLC processor board supporting a 16-bit PC/104
interface which combined with a PC/104 VGA CRT/Flat Panel display module can form the complete
DOS compatible PC for embedded applications. The board is fitted with 2 or 4 Mbytes of DRAM, 1 or
2 Mbytes of FlashFile

memory and optionally 128 Kbyte of battery backed SRAM. Systems BIOS
and extensions are contained in a 128 Kbyte EPROM. Onboard peripheral ports include COM1 and
COM2, a floppy disk controller, hard disk (IDE) controller, a parallel port (LPT1) and keyboard
interface.
The board is available in the following variants:
SBC104-386-252-F1 - 386SX processor, 2 Mbyte DRAM and 1 Mbyte Flash memory
SBC104-386-254-F2 - 386SX processor, 4 Mbyte DRAM and 2 Mbyte Flash memory
SBC104-486-504-F2 - 486SXLC processor, 4 Mbyte DRAM and 2 Mbyte Flash memory
Features
• 25MHz 80836SX or 50MHz TI 486SXLC2 processor
• TI486SXLC2 contains 8 Kbyte of internal cache
• PC-AT architecture
• 2 or 4 Mbytes of DRAM
• 1 or 2 Mbytes of FlashFile

memory
• Includes Arcom Flash Filing System
• Includes ROM-DOS 6.22
• Optional 128 Kbyte of battery backed SRAM
• Battery backed Real Time Clock
• FDD interface via vertical 34-way header
• HDD IDE interface via vertical 40-way header
• LPT parallel port via vertical 26-way header
• COM1 & COM2 RS232 serial ports via individual 9-way D-type plugs
• Link selectable half- duplex RS-485 available on COM2
• AT keyboard interface via a 6-way ‘Mini’ DIN socket
• Mini Buzzer for audible alarm
• Watchdog timer generating an NMI or optional reset (3 second time-out)
• PC/104 Interface, 16-bit, single Master only
• 11mAHr Ni-MH battery: Full charge time = 70 hours
Hold-up time = 550 hours
Battery life = 6 years @ 25°C
• Operating temperature range : 338866SSXX
+5°C to 65°C (with battery fitted)
-20°C to +70°C (without battery fitted)
448866SSXXLLCC
+5°C to 50°C (with battery fitted)
-20°C to +50°C (without battery fitted)
• Power Consumption: @ +5v 700mA
• MTBF (using generic figures from MIL-HDBK-217F at ground benign): 152,240 hours
• Single Eurocard form factor
• EMC Chassis connection point
• Status LEDs for Flash drive access and Processor running
• Single User Link
Arcom also manufactures a range of PC/104 modules for use with the SBC104. These include
optoisolated digital and analogue I/O, VGA controller, relay output, CAN interface, multi-port serial
communications and ethernet.
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2192-08704-000-000 J562 SBC104