GS1503B Gennum Corporation, GS1503B Datasheet - Page 68

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

Table 5-22: Register Settings
5.8 Audio Control Packets
5.8.1 Audio Control Packet Detection
Table 5-23: Register Settings
5.8.2 Audio Control Packet DID Setting
Name
CASCADE
Name
ACPG4_DET
ACPG3_DET
ACPG2_DET
ACPG1_DET
Description
Cascade enable (1: Enabled)
Description
Audio group 4 control packet detection (1: Detection)
Audio group 3 control packet detection (1: Detection)
Audio group 2 control packet detection (1: Detection)
Audio group 1 control packet detection (1: Detection)
The audio control packet detect registers will be set HIGH when a corresponding
audio group DID has been detected in the Luma channel of the input video stream.
Host Interface register 020h, bits 7-4, report the individual audio groups detected.
To demultiplex audio control packets for audio channels 1 to 4 (AOUT1/2 and
AOUT3/4), the CTRONA bit 2 of Host Interface register 02Fh is set HIGH. To
demultiplex audio control packets for audio channels 5 to 8 (AOUT5/6 and
AOUT7/8), the CTRONB bit 2 of Host Interface register 020h is set HIGH.
The audio control packet group DID for audio output channels 1 to 4 is set in
CTRIDA[1:0] bits 1-0 of Host Interface register 02Fh. The audio control packet
group DID for audio output channels 5 to 8 is set in CTRIDB[1:0] bits 3-2 of Host
Interface register 020h.
corresponding audio control packet group DID.
When CASCADE is set LOW (external pin or register), the GS1503B will default to
audio groups 1 and 2, where audio control packet data for channels 1 to 4 will be
demultiplexed from packets with group 1 DID, and audio control packet data for
channels 5 to 8 will be demultiplexed from packets with group 2 DID.
Control packet data is accessible via the corresponding registers in the Host
Interface.
Proprietary and Confidential
Table 5-24
37953 - 0
shows the 2-bit Host Interface setting for the
Address
Address
014
020
020
020
020
August 2006
Bit
7
Bit
7
6
5
4
GS1503B Data Sheet
Setting
Setting
1
–
–
–
–
Default
Default
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0
0
0
0
0