6
2.3Interface Connection
2.3.1LPTInterface Connection
TheLPTinterfaceof SP-POS58 ⅣPprinteris compatiblewith
CENTRONICS,supports BUSYand /ACK handshaking protocol,ituses
DB25 socket(male), thepinorderof parallelportis asFig. 2-2 shows:
Fig.2-2 PinOrderofParallelPort
Thepinassignmentof parallelinterface is showninFig. 2-3shows:
PinNo. Signal Direction Description
1 /STB In Strobepulsetolatch data,
reading occursatfallingedge.
2
3
4
5
6
7
8
9
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
DATA8
In
In
In
In
In
In
In
In
Thesesignals representthe1
st
bit to8
th bit of theparallel
interface data,eachsignalisat
HIGHT levelwhendatais
logic1,and LOWwhendatais
logic0.
10 /ACK Out
Answerpulse, LOWlevel
signalindicatesthatdatahave
alreadybeenreceivedand the
printergets readytoreceivethe
nextdata.
Caution!
1.Whenthereis no paperintheprinthead,pleasedon’tpress 【LF】
button, avoidingtoinfluence theprintheadlife;
2.Pleasedon’tdrawthepaperforwards or backwards withhands,When
returningpaper, pleasecuttheextrapaper, and press 【LF】
button, paperwill goforwards.
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