STAC9752 Datasheet, PDF (49/95 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
Bit(s) Reset Value
15
1
14
0
13
0
12:8
0
7:6
0
5
0
4:0
0
Name
Mute
RESERVED
ML5
ML<4:0>
RESERVED
MR5
MR<4:0>
Description
0 = No mute
1 = Mutes both left & right channels
Bit not used, should read back 0
0 = Lineout attenuation is a function of bits12-8
1 = Forces register bits 12-8 to be 11111. Always reads back 0.
Left Lineout Volume Control
00000 = 0dB attenuation
00001 = 1.5dB attenuation
.....
11111 = 46.5dB attenuation
Bits not used, should read back 0
0 = Lineout attenuation is a function of bits 4-0
1 = Forces register bits 4-0 to be 11111
Always reads back 0
Right Channel Lineout Volume Control
00000 = 0dB attenuation
00001 = 1.5dB attenuation
.....
11111 = 46.5dB attenuation
8.1.3.
Headphone Volume Registers (04h)
Default: 8000h
D15
D14
Mute
RSRVD
D7
D6
RESERVED
D13
HPL5
D5
HPR5
D12
HPL4
D4
HPR4
D11
HPL3
D3
HPR3
D10
HPL2
D2
HPR2
D9
HPL1
D1
HPR1
D8
HPL0
D0
HPR0
Bit(s) Reset Value
15
1
14
0
13
0
12:8
0
7:6
0
5
0
4:0
0
Name
Mute
RESERVED
ML5
ML<4:0>
RESERVED
MR5
MR<4:0>
Description
0 = No mute
1 = Mutes both left & right channels
Bit not used, should read back 0
0 = Headphone attenuation is a function of bits12-8
1 = Forces register bits 12-8 to be 11111. Always reads back 0
Left Headphone Volume Control
00000 = 0dB attenuation
00001 = 1.5dB attenuation
.....
11111 = 46.5dB attenuation
Bits not used, should read back 0
0 = Headphone attenuation is a function of bits 4-0
1 = Forces register bits 4-0 to be 11111. Always reads back 0
Right Channel Headphone Volume Control
00000 = 0dB attenuation
00001 = 1.5dB attenuation
.....
11111 = 46.5dB attenuation
IDT™
49
STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
REV 3.3 1206