alc203-lf Realtek Semiconductor Corporation, alc203-lf Datasheet - Page 20

• Manufacturer Part Number: alc203-lf
• Description: Two-channel Ac?97 2.3 Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

6.1.19 MX28 Extended Audio ID
Default: 0605h
The Extended Audio ID register is a read only register used to communicate information to the digital controller on two functions. ID1
and ID0 echo the configuration of the CODEC as defined by the programming of pins 45 and 46 externally. “00” returned defines the
CODEC as the primary CODEC, while any other code identifies the CODEC as one of three secondary CODEC possibilities.
Two-Channel AC’97 2.3 Audio Codec
13:12
11:10
Bit
8:6
5:4
15
14
9
3
2
1
0
section 9.1 for detailed information on configuration of ID[1:0].
DSA[1:0]
The ALC203 maps DAC slot according to the following table: (default maps to AC’97 spec. rev2.3)
ID[1:0] depend on the states of pins 46, 45, 44, and 43 when power-on reset or AC97_RESET# is active. Refer to
Type
R/W
R
R
R
R
R
R
R
0,0
0,1
1,0
1,1
REV[1:0]=10 to indicate that the ALC203 is AC’97 rev2.3 compliant
ID1
ID0
Reserved, Read as 0
AMAP read as 1 (DAC mapping based on ID)
Reserved, Read as 0
DAC Slot Assignment DSA[1:0] (Default value depends on ID[1:0])
DSA[1:0] Controls the DAC slot assignment, as described in AC’97 rev2.2.
Reserved, Read as 0
SPDIF Read as 1 (S/PDIF is supported)
DRA Read as 1
VRA Read as 1 (Variable Rate Audio is supported)
Left DAC slot #
10
3
7
6
Right DAC slot #
11
4
8
9
16
Default when ID[1:0]=00
Default when ID[1:0]=01,10
Default when ID[1:0]=11
Function
Comment
-
ALC203 DataSheet
Rev1.6