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GS1503BCVE2

HD Embedded Audio CODEC

Gennum -> Semtech 

5.9.1 Arbitrary Data Demultiplexing in External Pin Mode

This is the default mode for demultiplexing arbitrary data packets. The GS1503B will set

the PKTEN external pin HIGH before arbitrary data will be output. Two VCLK cycles

after PKTEN goes HIGH, arbitrary data is output on the PKT[7:0] bus. See Figure 5-12 for

timing.

The following arbitrary data is output on the PKT[7:0] bus: Data ID (DID), Secondary Data

ID (SDID), Data Count (DC) and User Data Words (UDW: up to a maximum of 255 words).

Y/Cb/ Cr [19:0]

GS1503B

VIN[19:0]

VCLK

PKTEN

PKT[7:0]

Arbitrary

Packet

2 CLKs

PKTEN

PKT[7:0]

Arbitrary Data Output Enable

Arbitrary Data

2 CLKs

Arbitrary Data

Figure 5-12: Arbitrary Data Packet Output Timing Diagram

5.9.2 Arbitrary Data Demultiplexing in Host Interface Mode

To select this mode, set ARBITMODE bit 0 in Host Interface register 050h HIGH. In this

mode, the DID, SDID, DC and User Data Words must be programmed in the

corresponding Host Interface registers. Set the video line number for field 1 and field 2

from which the arbitrary data packets are to be demultiplexed using the

ARBITLINEA[11:0] and ARBITLINEB[11:0] Host Interface registers respectively. The

arbitrary data packet is demultiplexed when the ARBITON bit 1 in Host Interface

register 050h is set HIGH. ARBITON should be set LOW when reading the arbitrary data

packet User Data Words from the ARBITUDW Host Interface registers.

GS1503B HD Embedded Audio CODEC

Data Sheet

37953 - 1

December 2009

71 of 90

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