IDTSTAC9750XXTAEC1XR IDT, Integrated Device Technology Inc, IDTSTAC9750XXTAEC1XR Datasheet - Page 39

• 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
6.5.6.
6.5.7.
POP BYP
LPBK
Mute
D15
D15
D7
D7
Used to select the record source independently for right and left.
Record Gain (1Ch)
Default: 8000h (corresponding to 0 dB gain with mute on)
The 1Ch register adjusts the stereo input record gain. Each step corresponds to 1.5dB. 22.5dB cor-
responds to 0F0Fh. The MSB of the register is the mute bit. When this bit is set to 1, the level for that
channel(s) is set at -∞dB.
General Purpose (20h)
Default: 0000h
Bit(s)
15:11
10:8
7:3
2:0
Mute
RSRVD
D14
D14
0
0
1
Reset
D6
D6
0
0
0
0
Reserved
Reserved
D13
D13
Reserved
D5
3D
D5
Reserved
SR2:SR0
SL2:SL0
Name
Table 19. Record Select Control Registers
Table 20. Record Gain Registers
Gx3… Gx0
D12
D12
39
D4
D4
0000
1111
xxxx
Bits not used, should read back 0
Left Channel Input Select
000 = Mic
001 = CD In (left)
010 = Video In (left)
011 = Aux In (left)
Bits not used, should read back 0
Right Channel Input Select
000 = Mic
001 = CD In (right)
010 = Video In (right)
011 = Aux In (right)
Reserved
Reserved
GR3
GL3
D11
D11
D3
D3
+22.5 dB gain
0 dB gain
-∞ gain
STAC9750/9751
GR2
Description
GL2
D10
D10
D2
D2
100 = Line In (left)
101 = Stereo Mix (left)
110 = Mono Mix
111 = Phone
100 = Line In (right)
101 = Stereo Mix (right)
110 = Mono Mix
111 = Phone
Function
GR1
GL1
MIX
D9
D1
D9
D1
PC AUDIO
V 5.8 103106
GR0
GL0
MS
D8
D0
D8
D0