STAC9750XXTAEC1X IDT, Integrated Device Technology Inc, STAC9750XXTAEC1X Datasheet - Page 51

• Manufacturer Part Number: STAC9750XXTAEC1X
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of STAC9750XXTAEC1X

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

IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
6.5.24.
6.5.25.
RSVD
D15
D7
D15
D7
0
0
Revision Code (6Ch)
Default: 00xxh
The device Revision Code register (index 6Ch) contains a software readable revision-specific code
used to identify performance, architectural, or software differences between various device revi-
sions. Bits 7:0 of the Revision Code register are user readable; bits 15:8 are not used at this time
and will return zeros when read. This value can be used by the audio driver, or miniport driver in the
case of WIN98
STAC9750/9751. This will allow the software driver to identify any required operational differences
between the existing STAC9750/9751 and future versions.
Analog Special (6Eh)
Default: 0000h
The Analog Special register has several bits used to control various functions specific to the
STAC9750/9751.
6.5.25.1. ALL MIX
The AC’97 ALL_MIX, bit D12 of register 6Eh, controls the record source when the Stereo Mix option
is selected for recording. If the AC’97 mode is default logic 1, the “Stereo Mix Record” option will
include the sum of the analog sources with or without 3D enhancement, and the main PCM DAC
output. If the “ALL Analog Record” option is selected, the Stereo Mix Record option will include the
sum of the analog sources only, with or without 3D enhancement. The “AC’97 mode” is useful for
recording all sound sources. The “ALL Analog Record” mode is useful in conjunction with the POP
BYPASS mode for recording all analog sources, which are often further processed and combined
with other PCM data to be output directly to the DAC outputs which are configured in POP_BYPASS
mode using the General Purpose register (index 20h).
MUTE FIX
DISABLE
Reserved
D14
D6
D14
D6
0
0
®
ADCSLT1
WDM approaches, to adjust software functionality to match the feature-set of the
D13
D5
D13
D5
0
0
AC97 ALL MIX
ADCSLT0
D12
D4
D12
51
D4
0
0
Reserved
D11
D3
D11
D3
0
0
20/30 SEL
D10
STAC9750/9751
D2
D10
D2
0
0
Reserved
SPLYOVR EN
D9
D1
D9
D1
0
0
PC AUDIO
SPLYOVR
V 5.8 103106
VAL
D8
D0
D8
D0
0
0