Dolby Laboratories Multichannel Audio Tool DP570 - Manual (Page 37)

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 Figure 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.