Using the GPI/O Connector
Dolby® DP570 Multichannel Audio Tool User’s Manual 21
Edgetriggeredsignalsareeitherpositiveornegative.Leveltriggeredsignalsareeither
highorlow.
TheFunctionmenuletsyouassignafunctiontothepinyouhaveselected.
GPI Setup
Inputpins23–36inFigure 37andTabl e 38areuserdefined.Todefineafunctionforan
inputpin,entertheGPI SetupmenuintheSystem SettingsportionoftheSetup
menu,usethearrowbuttonstoselectthepinnumberyouwishtodefine,andpressEnter.
Threesubmenusareavailable:Trigger,Polarity,andFunction.Triggerdefinesthe
typeofsignalthepinrequiresandcanbesettoLevelorEdge.IfsettoLevel,thepinis
triggeredbyaconstantlevel;ifsettoEdge,thepinrequiresapulseof100msminimum
duration.PolaritycanbesettoPositive/HighorNegative/Low.Edgetriggered
signalsareeitherpositiveornegative.Leveltriggeredsignalsareeitherhighorlow.
TheFunctionmenuletsyouassignafunctiontothepinyouhaveselected.