alc203-lf Realtek Semiconductor Corporation, alc203-lf Datasheet - Page 26

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

6.3.3 Page -1h, MX66 Sense Function Select
Default: 0000h
6.3.4 Page -1h, MX68 Sense Function
Default: 02F1h
Two-Channel AC’97 2.3 Audio Codec
15:11
15:5
Bit
4:1
Bit
9:5
3:1
10
0
4
0
Type
Type
R/W
R/W
R/W
R/W
R/W
R/W
NA
R
Reserved
Function Code bits, FC[3:0]
These bits specify the type of audio function described in page ID-01h MX66, MX68 and MX6A.
Tip or Ring Selection, T/R
This bit sets which jack conductor the sense value is measured from. It is combined with FC[3:0].
Gain bits, G[4:0]
These bits are updated by BIOS to tell driver the gain supported by external amplifier. 1 LSB = 1.5dBV
Inversion bit, INV
Buffer delays, DL[4:0]
Delay measurement for the signal from inputs to outputs channels in 20.83µsec (1/48000 second) units.
Information Valid bit, IV
Reserved
Function Information Present, FIP
This bit when set to a ‘1’ indicates that the G[4:0], INV, DL[4:0] and ST[2:0] bits are supported and are
Read/Write capable.
00000b: 0dBV, 00001b: +1.5dBV,… 01111b:+24dBV
10000b: 0dBV, 10001b: -1.5dBV,… 11111b: -24dBV
Clearing this bit by writing “1”, writing “0” to this bit has no effect.
0h: LINE OUT
1h: HP OUT
5h: MIC1 In
6h: MIC2 In
7h: LINE In
Others: Not supported
0: Tip (Left channel)
1: Ring (Right channel)
0: No inversion reported
0: After a sense cycle is completed, indicates that no information is provided on the sensing method
1: After a sense cycle is completed, indicates that information is provided on the sensing method
1: Inverted.
22
Function
Function
ALC203 DataSheet
Rev1.6