GS1503 Gennum Corporation, GS1503 Datasheet - Page 30

• Manufacturer Part Number: GS1503
• Description: HD Embedded Audio Codec
• Manufacturer: Gennum Corporation

Table 6: Audio Control Packet Word Descriptions
1.10.2 Audio Control Packet DID Setting
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. Table 7 shows the 2-bit Host
Interface setting for the corresponding audio control packet
group DID.
When CASCADE is set LOW (external pin or register), the
GS1503 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.
DEL1-2
DEL3-4
NAME
RSRV
RATE
DBN
ADF
ACT
DID
DC
CS
AF
NO OF WORDS
3
1
1
1
1
1
1
3
3
2
1
Ch1/2 Delay Data
Ch3/4 Delay Data
Ancillary Data Flag
Audio Group Data ID
Data Block Number
Data Count
Audio Frame Number
Sampling Frequency
Active Channel
Reserved Words
Checksum. Calculates the sum of lower 9 bits of 15
words from DID
DESCRIPTION
30
Control packet data can be programmed via the
corresponding registers in the Host Interface.
Table 7: Audio Control Packet Group DID Host
Interface Settings
GROUP
AUDIO
1
2
3
4
10-BIT DATA
1E3h
2E2h
2E1h
1E0h
DATA
000h
1E3h
2E2h
2E1h
1E0h
10Bh
3FFh
3FFh
200h
200h
-
-
-
-
-
-
REGISTER SETTING (2-BIT)
HOST INTERFACE
CHACT[7:0] setting
9-bit Host Interface
4-bit Host Interface
Interface setting
Interface setting
Interface setting
GENERATION
Section 1-10-2
See Table 7 in
11b
10b
01b
00b
27-bit Host
27-bit Host
18-bit Host
AUTO-
Setting
Setting
Yes
Yes
Yes
Yes
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