alc250-lf Realtek Semiconductor Corporation, alc250-lf Datasheet - Page 25

• Manufacturer Part Number: alc250-lf
• Description: Two-channel Ac?97 2.3 Audio Codec With Equalizer
• Manufacturer: Realtek Semiconductor Corporation

6.3 Discovery Descriptor (Page ID-01h)
These registers are defined in Ac’97 2.3 for sensing and analog plug&play functions.
6.3.1 MX62 PCI Sub System ID
Default: FFFFh
6.3.2 MX64 PCI Sub Vendor ID
Default: FFFFh
6.3.3 MX66 Sense Function Select
Default: 0000h
Two-Channel AC’97 2.3 Audio Codec
15:0
15:0
15:5
Bit
Bit
Bit
4:1
0
Type
Type
Type
R/W
R/W
R/W
R/W
PCI Sub System Vendor ID
This register can be written once only after power on. BIOS can set its own sub-system ID.
The default value FFFFh means this register is implemented and data is not set by BIOS.
PCI Vendor ID
This register can be written once only after power on. BIOS can set its own sub-vendor ID.
The default value FFFFh means this register is implemented and data is not set by BIOS.
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].
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)
20
Function
Function
Function
ALC250 DataSheet
Rev1.3