STAC9766 Datasheet, PDF (74/97 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
PC AUDIO
G[4:0]
00000
00001
01111
10001
11111
Bit
D5:D15
D4
D3:1
D0
Table 25. Gain or Attenuation Examples
Gain or Attenuation (dB relative to level-out)
0 dBV
+1.5 dBV
+24 dBV
-1.5 dBV
-24 dBV
Table 26. Register 68h/Page 01h Bit Overview
Bit R/W Overview
Read/Write and only reset on POR (Power on Reset) and not by RESET#.
Read/Write and should NOT be set by the BIOS
Reserved
Read Only.
8.4.6. Digital Audio Control (6Ah, Page 00h)
To access Register 6Ah, Page 00h must be selected in Register 24h.
Default: 0000h
D15
D14
D13
D12
D11
D10
D9
D8
RESERVED
D7
D6
D5
D4
D3
D2
D1
D0
RESERVED
SPOR
DO1
RSVD
Bit(s) Reset Value Name
Description
15:3
0
RESERVED Bits not used, should read back 0
2
0
SPOR
Over-ride Register 2Ah, D12 write-lock when SPDIF_EN = 1.
All bits except SPDIF sample-rate are affected (D13-D12). Allows for sub-code
changing on-the-fly.
1
0
DO1
SPDIF Digital Output Source Selection:
DO1 = 0; PCM data from the AC-Link to SPDIF
DO1 = 1; ADC record data to SPDIF
0
0
RESERVED Bits not used, should read back 0
8.4.7. Sense Details (6Ah Page 01h)
Register 24h must be set to Page 01h to access this register.
Default: NA
D15
D14
D13
D12
D11
D10
D9
D8
ST2
ST1
ST0
S4
S3
S2
S1
S0
D7
D6
D5
D4
D3
D2
D1
D0
OR1
OR0
SR5
SR4
SR3
SR2
SR1
SR1
IDT™
74
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06