
Using the GPI/O Connector
Dolby® DP570 Multichannel Audio Tool User’s Manual 21
Edge‐triggeredsignalsareeitherpositiveornegative.Level‐triggeredsignalsareeither
highorlow.
TheFunctionmenuletsyouassignafunctiontothepinyouhaveselected.
GPI SetupInputpins23–36inFigure 3‐7andTabl e 3‐8areuser‐defined.Todefineafunctionforan
inputpin,entertheGPI SetupmenuintheSystem SettingsportionoftheSetup
menu,usethearrowbuttonstoselectthepinnumberyouwishtodefine,andpressEnter.
Threesubmenusareavailable:Trigger,Polarity,andFunction.Triggerdefinesthe
typeofsignalthepinrequiresandcanbesettoLevelorEdge.IfsettoLevel,thepinis
triggeredbyaconstantlevel;ifsettoEdge,thepinrequiresapulseof100msminimum
duration.PolaritycanbesettoPositive/HighorNegative/Low.Edge‐triggered
signalsareeitherpositiveornegative.Level‐triggeredsignalsareeitherhighorlow.
TheFunctionmenuletsyouassignafunctiontothepinyouhaveselected.