1
GENERAL INFORMATION
1.1
FEATURES
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PC/104 com pli ant dual se rial/par al lel I/O mod ule
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Two fully 16550 com pati ble async se rial chan nels
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A fully com pati ble Cen tron ics par al lel port
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16- byte se rial trans mit/re ceive FIFO
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Full RS- 232 Mo dem con trol line sup port
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Pro gram ma ble Baud rates from 50 to 115,200 bps
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Four Jumper se lecta ble se rial I/O maps
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Two jumper se lecta ble Par al lel port ad dresses
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Sup ports op tional RS- 422, RS- 485, and SAE J1708 on both chan nels
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Dual mode bi- directional par al lel printer port
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+5 Volt only op era tion
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-40° to +85° C op er at ing tem pera ture range
1.2
GENERAL DESCRIPTION
The PCM- DSPIO is a small low- cost, add- on mod ule for PC/104 based sys tems that pro -
vides two PC com pati ble se rial ports and a PC com pati ble par al lel printer port. Both se rial
chan nels come stan dard sup port ing RS- 232 in clud ing all stan dard Mo dem con trol lines.
Ei ther or both chan nels can op tion ally be con fig ured for RS- 422 or RS- 485 in ter face lev els.
A fac tory con fig ured op tion al lows for sup port of SAE J1708 on both se rial chan nels. The
pro gram ma ble 16- byte trans mit and re ceive FI FOs al low for mul ti ple chan nels of high
speed se rial I/O with out ex ces sive proc es sor bot tle neck ing. The PC com pati ble par al lel
port can be used as a pri mary or sec on dary printer port or can be used for gen eral pur pose
digi tal I/O with its bi- directional ca pa bil ity.
981117
PCM-DSPIO/J1708 OPERATIONS MANUAL
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