STAC9750XXTAEC1X IDT, Integrated Device Technology Inc, STAC9750XXTAEC1X Datasheet - Page 35

• 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
6.5.1.
6.5.2.
RSRVD4
Mute
D15
D15
ID7
D7
D7
Reset (00h)
Default: 6990h
Writing any value to this register performs a register reset, which causes all registers to revert to
their default values. Reading this register returns the ID code of the part.
Play Master Volume Registers (Index 02h, 04h, and 06h)
These registers manage the output signal volumes. Register 02h controls the stereo LINE_OUT
master volume (both right and left channels), register 04h controls the Headphone Out master vol-
ume, and register 06h controls the MONO volume output. Each step corresponds to 1.5 dB. The
MSB of the register is the mute bit. When this bit is set to 1 the level for that channel is set at -∞ dB.
ML5 through ML0 is for left channel level, MR5 through MR0 is for the right channel and MM5
through MM0 is for the mono out channel. When bits D5 and D13 are set in any of these registers it
automatically writes all 1 to the next lower 5-bits.
The default value is 8000h for registers 02h, 04h, and 06h, which corresponds to 0 dB attenuation
with mute on.
6.5.2.1.
Default: 8000h
6.5.2.2.
Default: 8000h
Note: If optional bits D13 & D5 of register 02h are set to 1, then the corresponding attenuation is set to
Reserved
Mute
0
0
1
46.5dB and the register reads will produce 1Fh as a value for this attenuation/gain block.
RSRVD
D14
SE4
D14
ID6
D6
D6
Master Volume (02h)
Headphone Out Volume (04h)
Mx5…Mx0
00 0000
01 1111
xx xxxx
MR5
SE3
ML5
D13
D13
ID5
D5
D5
Table 16. Play Master Volume Register
MR4
ML4
D12
SE2
D12
ID4
35
D4
D4
∞ dB Attenuation
46.5 Attenuation
0dB Attenuation
Function
MR3
SE1
ML3
D11
D11
ID3
D3
D3
STAC9750/9751
MR2
SE0
ML2
D10
D10
ID2
D2
D2
MR1
ML1
ID9
ID1
D9
D1
D9
D1
Range
Req.
Req.
Req.
PC AUDIO
V 5.8 103106
MR0
ML0
ID8
ID0
D8
D0
D8
D0