STAC9758 Datasheet, PDF (89/119 Pages) Integrated Device Technology – HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS

STAC9758/9759
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
PC AUDIO
Bit(s) Reset R/W Name
Description
11:10 01 RW
RS[1:0]
Pins 39/41 (“Rear” in 6ch default mode )
00 = Front (DAC-A).........Volume = 0x04
10 = CTR/LFE (DAC-C)...Volume = 0x36
01 = Rear (DAC-B)...Volume = 0x38
11 = Mixer Out.......Volume = 0x02
9
1 RW FSEN Pin 35/36 output enable (0 = pad powered down)
Line_Out = Pins 35/36
8:7 11 RW FS[1:0] 00 = Front (DAC-A)..........Volume = 0x04 01 = Rear (DAC-B)..Volume = 0x38
10 = CTR/LFE (DAC-C)...Volume = 0x36 11 = Mixer Out.........Volume = 0x02
6
0 RW LSEN Pin 23/24 output enable
Line-In = Pins 23/24
5:4 01 RW LS[1:0] 00 = Front (DAC-A)....... .Volume = 0x04 01 = Rear (DAC-B)...Volume = 0x38
10 = CTR/LFE (DAC-C)...Volume = 0x36 11 = Mixer Out.......Volume = 0x02
3
0 RW MSEN Pin21/22 output enable (0 = pad powered down)
Mic = Pins 21/22
2:1 10 RW MS{1:0] 00 = Front (DAC-A)..........Volume = 0x04 01 = Rear (DAC-B)..Volume = 0x38
10 = CTR/LFE (DAC-C)...Volume = 0x36 11 = Mixer Out.........Volume = 0x02
0
0 RO RESERVED Bit not used, should read back 0
Each output capable pin can have 4 sources: DAC-A, DAC-B, DAC-C, and Mixer Out. Each may be
disabled/high-Z for use as an input. The 3 select bits work as follows:
xSEN
xS1
xS0
1
0
0
1
0
1
1
1
0
1
1
1
0
x
x
Resource
Front (DAC-A)
Rear (DAC-B)
CTR/LFE (DAC-C)
MIXER OUT
DISABLED
Volume Control Register
0x04
0x38
0x36
0x02
8.6.6.
PCI SSID (64h Page 01h)
Register 24h must be set to Page 01h to access this register.
Default: FFFFh
D15
D14
D13
D12
D11
D10
D9
D8
PI15
PI14
PI13
PI12
PI11
PI10
PI9
PI8
D7
D6
D5
D4
D3
D2
D1
D0
PI7
PI6
PI5
PI4
PI3
PI2
PI1
PI0
Bit(s) Reset Value R/W Name
Description
PCI:
This field provides the PCI Sub System ID of the Audio or Modem Sub
15:0
FFFFh
RW
PI15:PVI0
Assembly (i.e., CNR Model, Motherboard SKU). This is NOT the CODEC
vendor PCI ID, nor the AC '97 controller PCI ID. Information in this field must
be available for AC '97 controller reads when CODEC ready is asserted in
AC link. If data is not available, returns FFFFh.
IDT™
89
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
STAC9758/9759
V 1.2 1206