User`s manual

DP572 Dolby

E Decoder User’s Manual Hardware Description

Table 5-3 DP572 Status Port Pin Functions

Pin Direction Connection Description

1 Output Dolby

E detect 1—Dolby E 0—PCM or none

2 Output Reference video valid 1—Valid 0—Ref video error

3 Output Dolby E decoding valid 1—Valid 0—Decoding error

4 Output System operational 1—Functional 0—Failed

5 Output Fault 1—Functional 0—Hardware fault

6 Output Reserved

7 Input PCM channel routing Voiceover and Switched Out mode

8 Input PCM channel routing Voiceover and Switched Out mode

N/A

Ground

Pins 1–5

These indicate details regarding the current condition of the unit. The numeral 1

corresponds to a high level (internal pull up) on the corresponding pin.

Pins 7–8

These can be used to select Voiceover and Switched Out modes. The state of the pins

is normally high, and they detect a high-to-low transition. A held contact closure

between pins 7 and 9 (ground) or pins 8 and 9 is required to activate a function. A

low-to-high transition (that is, a switch release) restores the Delay Out setting.

Table

5-4 shows the function of the two GPI pins on the DP572.

Table 5-4 Status Port Output-Routing Mode Selection

Ctrl in Pin 8 Ctrl in Pin 7

PCM Chan Config

Output Routing Mode

High High Delay Out

High Low Voiceover

Low High Switched Out

Low Low Reserved

Figure 5-2 details the channel routing of Voiceover and Switched Out modes for a

5.1-channel input.

5-4