- Dolby Multichannel Audio Tool User's Manual

Using the GPI/O Connector
Dolby
®
DP570 Multichannel Audio Tool User’s Manual 21
Edge‐triggeredsignalsareeitherpositiveornegative.Level‐triggeredsignalsareeither
highorlow.
TheFunctionmenuletsyouassignafunctiontothepinyouhaveselected.
GPI Setup
Inputpins23–36inFi gure 3‐7andTable 3‐8areuser‐defined.Todefineafunctionforan
inputpin,entertheGPI SetupmenuintheSystem SettingsportionoftheSetup
menu,usethearrowbuttonstoselectthepinnumberyouwishtodefine,andpress
Enter.
Threesubmenusareavailable:Trigger,Polarity,andFunction.Triggerdefinesthe 
typeofsignalthepinrequiresandcanbesettoLevelorEdge.IfsettoLevel,thepinis
triggeredbyaconstantlevel;ifsettoEdge,thepinrequiresapulseof
100msminimum
duration.PolaritycanbesettoPositive/HighorNegative/Low.Edge‐triggered
signalsareeitherpositiveornegative.Level‐triggeredsignalsareeitherhighorlow.
TheFunctionmenuletsyouassignafunctiontothepinyouhaveselected.