Dolby Laboratories DP570 - Manual (Page 33)

Controlling the DP570 Using the GPI/O Connector
Dolby ® DP570 Multichannel Audio Tool User’s Manual 21
Table 3‐7 provides a description for functions that can be assigned to GPI pins. Some
functions have restrictions on the polarity or trigger type. GPI functions that are mutually
exclusive must be edge‐triggered. The Active State column indicates the DP570 state that
results when the pin is forced to the logic level indicated, if it is level‐triggered.
Bs speaker mute a Either Either Mute Indicates Mute is active.
Speaker Select a
(Multi, Stereo, Mono)
Either Either Speaker selected Indicates which speaker is selected.
Program Select (1–8) Either Either Enabled Indicates which program is selected.
Preset Select (1–32) Either Either Enabled Indicates which preset is selected.
Downmix Mode
(Full, Stereo, Mono,
Phant, 3‐Stereo) Either Either Enabled Indicates which mode is selected.
Dynamic Range
Control Mode
(Line, RF, Custom) Either Either Enabled Indicates which compression mode is
selected.
Reference Level a Either Level 0 dB Indicates Master Volume = 0 dB.
a. Not available in units without the Cat. No. 548 Analog Option Card.
Table 3-7 GPI Functions Available
Function Polarity Trigger Active State Description
V Ref Either Either V Ref error No signal or invalid signal. (Check for
proper termination.)
Metadata in 1 Either Either Metadata error Invalid signal while unit is in External
Metadata mode.
Metadata in 2 Either Either Metadata error Invalid signal while unit is in External
Metadata mode.
Emulator bypass Either Either Bypass Indicates Bypass is active.
Delay LED Either Either On Not yet implemented.
Lt/Rt input Either Either Enabled Indicates Lt/Rt input is active.
Dim/mute a Either Either Enabled Indicates Dim Gain setting is active.
Surround EX Either Either EX on Indicates Surround EX is active.
Pro Logic Either Either Pro Logic on Indicates Pro Logic is active.
L speaker mute a Either Either Mute Indicates Mute is active.
R speaker mute a Either Either Mute Indicates Mute is active.
C speaker mute a Either Either Mute Indicates Mute is active.
SW speaker mute a Either Either Mute Indicates Mute is active.
Ls speaker mute a Either Either Mute Indicates Mute is active.
Rs speaker mute a Either Either Mute Indicates Mute is active.
Bs speaker mute a Either Either Mute Indicates Mute is active.
Speaker Select a
(Multi, Stereo, Mono)
Either Either Speaker selected Indicates which speaker is selected.
Table 3-6 GPO Functions Available
Function Polarity Trigger Active State Description