Data Sheet

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7
ETHERIO24TCPDATASHEET
TestControls
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Value
Theportvalueiswrittentoorreadfromtheentireportwitheachofthe
valuebitsaffectingthecorrespondingI/Oline.TheAutoreadvalues
checkboxwhencheckedwillconstantlyreadPortA,B,C(poll)onthe
devicetoseeifthepinhaschanged.
Direction
TheDirectionvalueoftheportcanbesetaseitherinputoroutput.
Whensetasoutput,theI/Olinewillbedriventothelastvaluewritten
totheport.Thisvaluecanbepresetbywritingtotheportbefore
writingtothedirectionregister.
PullUp
ThePullUpconfigurationappliestothoselinesthataresetasinputs,
writinga1tothecorrespondingbitappliesapullupresistortothe
linesothatifitisnotdrivenlowitwillbepulledtoaknownhigh
state,thisisveryusefulifsensingcontactclosuresoropencollector
outputs
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©
2013ElexolPtyLtd Revision1.3
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