GS1503B Gennum Corporation, GS1503B Datasheet - Page 37

• Manufacturer Part Number: GS1503B
• Description: Hd Embedded Audio Codec
• Manufacturer: Gennum Corporation

4.9 Multiplex Cascade Mode
Table 4-28: Register Settings
Name
CASCADE
Group 1
Group 2
Audio
Audio
Y/C b /C r [19:0]
Audio Channels 1 & 2
Audio Channels 3 & 4
Audio Channels 5 & 6
Audio Channels 7 & 8
Description
Cascade enable (1: Enabled)
VIN[19:0]
AIN1/2
AIN3/4
AIN5/6
AIN7/8
CASCADE
Two GS1503B devices can be cascaded in series to allow up to 16 channels of
audio to be multiplexed (only one device requires CASCADE to be set HIGH).
Figure 4-16
the GS1503B for cascade mode, the CASCADE external pin or CASCADE bit 7 of
Host Interface register 014h is set HIGH. When set HIGH, the GS1503B will default
to audio groups 3 and 4. When set LOW, the GS1503B will default to audio groups
1 and 2.
Figure 4-16: Multiplexing 16 Channels of Audio using Cascade Architecture
When CASCADE is set LOW, the GS1503B will multiplex audio data and control
packets as shown in
data stream is shown). Any existing audio data or control packets will be deleted
and replaced with blanking data before the new packets are multiplexed. New
packets are multiplexed immediately after the two video line CRC words.
When CASCADE is set HIGH, the GS1503B will multiplex the audio data and
control packets immediately after the existing packets, as shown in
Avoid multiplexing new ancillary data packets with the same audio group DID as
existing packets.
Proprietary and Confidential
GS1503B
VOUT[19:0]
shows the cascade architecture for a 16-channel system. To configure
Group 3
Group 4
Audio
Audio
Figure 4-17
Y/C b /C r [19:0]
Audio Channels 9 & 10
Audio Channels 11 & 12
Audio Channels 13 & 14
Audio Channels 15 & 16
37953 - 0
(NOTE: Only the Chroma channel of the video
Address
+3.3V
014
August 2006
VIN[19:0]
AIN1/2
AIN3/4
AIN5/6
AIN7/8
CASCADE
Bit
GS1503B
7
GS1503B Data Sheet
VOUT[19:0]
Setting
1
Figure
Default
Y/C b /C r [19:0]
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0