GS1503B Gennum Corporation, GS1503B Datasheet - Page 71
GS1503B
Manufacturer Part Number
GS1503B
Description
Hd Embedded Audio Codec
Manufacturer
Gennum Corporation
Datasheet
1.GS1503B.pdf
(88 pages)
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5.9.1 Arbitrary Data Demultiplexing in External Pin Mode
5.9.2 Arbitrary Data Demultiplexing in Host Interface Mode
PKT[7:0]
Arbitrary
PKTEN
Packet
VCLK
2 CLKs
Y/C b / C r [19:0]
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
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).
Figure 5-12: Arbitrary Data Packet Output Timing Diagram
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.
Proprietary and Confidential
Figure 5-12
for timing.
VIN[19:0]
GS1503B
37953 - 0
PKT[7:0]
Arbitrary Data
PKTEN
August 2006
Arbitrary Data Output Enable
GS1503B Data Sheet
Arbitrary Data
2 CLKs
71 of 88
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