STAC9766XXTAEC1X IDT, Integrated Device Technology Inc, STAC9766XXTAEC1X Datasheet - Page 77

• Manufacturer Part Number: STAC9766XXTAEC1X
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of STAC9766XXTAEC1X

• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 3.135/4.75V
• Single Supply Voltage (max): 3.465/5.25V
• Package Type: TQFP
• Lead Free Status / RoHS Status: Compliant

IDT™
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
8.4.10.
Bit(s) Reset Value
15:13
INT APOP
11:7
5:4
12
6
3
2
1
0
D15
D7
Analog Current Adjust (72h)
To unlock Register 72h, write 0xABBA to Register 70h.
Default: 0000h
0
1
0
0
0
0
0
0
0
D14
D6
MIC GAIN VAL
SPLYOVR_EN
SPLYOVR_VA
RESERVED
RESERVED
RESERVED
ADCSLT1:0
MUTEFIX
AC97MIX
DISABLE
Name
L
D13
D5
Bits not used, should read back 0
0 = mixer record contains a mix of all mono and stereo analog input signals,
not the DAC (ALL ANALOG mode)
1 = mixer record contains a mix of all mono and stereo analog input signals
plus the DAC signal (AC97 mode)
This bit only has an effect when either Stereo Mix or Mono Mix is selected as
the record source in Reg. 1Ah.
The “ALL” mode is useful in conjunction with the POP BYPASS mode (Reg.
20h;D15) to record all analog sources, perform further processing in the
digital domain, including combining with other PCM data, and routing through
the DACs directly to Line Out, Headphone Out, or Mono Out.
A Stereo Mix recording will be affected by the setting of the 3D Effects bit
(Reg. 20h;D13)
Bits not used, should read back 0
0 = MUTE FIX Enabled
1 = MUTE FIX Disabled
When this bit is zero, and either channel is set to -46.5dB attenuation, 1Fh,
then that channel is fully muted. When this bit is one, then operation is per
AC’97 specification.
Select slots for ADC data on ACLINK
00 = left slot 3, right slot 4
01 = left slot 7, right slot 8
10 = left slot 6, right slot 9
11 = left slot 10, right slot 11
Reserved
Adds +10dB gain to the selected MIC input. Use in conjunction with
BOOSTEN (Reg. 0Eh;D6)
BOOSTEN MICGAINVAL
0
0
1
1
Supply Override bit allows override of the supply detect.
0 = no override on supply detect
1 = override supply detect with bit 0
Supply Override Value provides the analog voltage operation values.
0 = force 3.3V operation
1 = force 5V operation
D12
D4
77
RESERVED
0
1
0
1
RESERVED
D11
D3
= 0 dB
= 10 dB
= 20 dB
= 30 dB
Description
STAC9766/9767
D10
D2
D9
D1
PC AUDIO
V 7.4 12/06
D8
D0