IDTSTAC9750XXTAEC1XR IDT, Integrated Device Technology Inc, IDTSTAC9750XXTAEC1XR Datasheet - Page 37

• Manufacturer Part Number: IDTSTAC9750XXTAEC1XR
• Description: IC CODEC AC'97 2CH VALUE 48-LQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9750XXTAEC1XR

• Resolution (bits): 18 b, 20 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 85 / 89
• Voltage - Supply, Analog: 3.14 V ~ 3.47 V; 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.14 V ~ 3.47 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9750XXTAEC1XR

IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
6.5.4.
RSRVD
Mute
Mute
Mute
D15
D15
D15
D7
D7
D7
Analog Mixer Input Gain Registers (Index 0Ch - 18h)
These registers control the gain/attenuation for each of the analog inputs. Each step corresponds to
approximately 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.
The default value for stereo registers is 8808h, corresponding to 0 dB gain with mute on.
6.5.4.1.
Default: 8008h
6.5.4.2.
Default: 8008h
Register 0Eh (Mic Volume Register) Bit D6 is the Mic boost enable. To select between 20dB or 30dB
Mic Boost, see register 6Eh, D2 in section 6.5.25; page 51.
6.5.4.3.
Default: 8808h
BOOST_EN
Mute
Reserved
Reserved
0
0
0
D14
D14
D14
D6
D6
D6
Phone Mixer Volume (0Ch)
Mic Mixer Volume (0Eh)
Line In Mixer Volume (10h)
Reserved
RSRVD
D13
D13
D13
D5
D5
D5
Table 18. Analog Mixer Input Gain Register
Gx4…Gx0
0 0000
0 1000
1 1111
GN4
GN4
GR4
D12
D12
D12
GL4
37
D4
D4
D4
Reserved
Reserved
GN3
GN3
GR3
GL3
D11
D11
D11
D3
D3
D3
STAC9750/9751
GN2
GN2
GR2
GL2
D10
D10
D10
D2
D2
D2
-34.5 dB gain
+12 dB gain
Function
0 dB gain
GN1
GN1
GR1
GL1
D9
D1
D9
D1
D9
D1
PC AUDIO
V 5.8 103106
GN0
GN0
GR0
GL0
D8
D0
D8
D0
D8
D0