GS1503B Gennum Corporation, GS1503B Datasheet - Page 40

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

Table 4-29: Audio Control Packet Word Descriptions
4.10.2 Audio Control Packet DID Setting
Name
ADF
DID
DBN
DC
AF
RATE
ACT
DEL1-2
DEL3-4
RSRV
CS
No of Words
3
1
1
1
1
1
1
3
3
2
1
To multiplex audio control packets for audio channels 1 to 4 (inputs AIN1/2 and
AIN3/4), the CTRONA bit 2 of Host Interface register 02Fh must be set HIGH. To
multiplex audio control packets for audio channels 5 to 8 (inputs AIN5/6 and
AIN7/8), the CTRONB bit 2 of Host Interface register 020h must be set HIGH.
The audio control packet group DID for audio input 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 input 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 the audio control packet for AIN1/2 and AIN3/4 will be
multiplexed with group 1 DID, and AIN5/6 and AIN7/8 with group 2 DID.
Control packet data can be programmed via the corresponding registers in the
Host Interface.
Proprietary and Confidential
Description
Ancillary Data Flag
Audio Group Data ID
Data Block Number
Data Count
Audio Frame Number
Sampling Frequency
Active Channel
Ch1/2 Delay Data
Ch3/4 Delay Data
Reserved Words
Checksum. Calculates
the sum of lower 9 bits of
15 words from DID
Table 4-30
37953 - 0
shows the 2-bit Host Interface setting for the
Data
000h
3FFh
3FFh
1E3h
2E2h
2E1h
1E0h
200h
10Bh
–
–
–
–
–
200h
–
August 2006
GS1503B Data Sheet
Yes
9-bit Host Interface
18-bit Host Interface
Auto-Generation
Yes
See
Section 5.8.2
Yes
Setting
4-bit Host Interface
Setting
CHACT[7:0] setting
26-bit Host Interface
setting
26-bit Host Interface
setting
setting
Yes
Table 4-30
in
40 of 88