參數(shù)資料
型號: STAC9711
廠商: Electronic Theatre Controls, Inc.
元件分類: Codec
英文描述: Multi-Channel AC97 Codec With Multi-Codec Option
中文描述: 多聲道AC97編解碼器與多編解碼器方案
文件頁數(shù): 30/56頁
文件大?。?/td> 247K
代理商: STAC9711
SigmaTel, Inc.
Preliminary
STAC9708/11
30
10/02/98
4.4.6
Record Gain Registers (Index 1Ch)
The 1Ch register adjusts the stereo input record gain. Each step corresponds to 1.5 dB. 22.5 dB
corresponds to 0F0Fh and 000Fh respectively. 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.
The default value is 8000h, which corresponds to 0 dB gain with mute on.
Table 14
. Record Gain Registers
MUTE
Gx3… Gx0
FUNCTION
0
1111
+22.5 dB gain
0
0000
0 dB gain
1
xxxx
-
gain
4.4.7
General Purpose Register (Index 20h)
This register is used to control some miscellaneous functions. Below is a summary of each bit and its
function. The MS bit controls the mic selector. The LPBK bit enables loopback of the ADC output to
the DAC input without involving the AC-Link, allowing for full system performance measurements.
Table 15
. General Purpose Register
BIT
FUNCTION
3D
3D Stereo Enhancement on/off 1 = on
MIX
Mono output select 0 = Mix, 1= Mic
MS
Mic select 0 = Mic1, 1 = Mic2
LPBK
ADC/DAC loopback mode
4.4.8
3D Control Register (Index 22h)
This register is used to control the 3D stereo enhancement function,
Sigmatel Surround 3D (SS3D),
built into the AC'97 component. Note that register bits, DP1-DP0 and DPR1-DPR0 are used to control
the separation ratios in the 3D control for both LINE_OUT and DAC_OUT respectively. This allows
相關(guān)PDF資料
PDF描述
STAC9711T Multi-Channel AC97 Codec With Multi-Codec Option
STC12LE0154 Silver Mica Capacitor; Capacitance:3000pF; Capacitance Tolerance:+/- 5%; Series:CDV30; Voltage Rating:2500VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:11.1mm; Leaded Process Compatible:No RoHS Compliant: No
STC12LE0154AD Silver Mica Capacitor; Capacitance:330pF; Capacitance Tolerance: 5%; Series:CDV30; Voltage Rating:2500VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:11.1mm; Leaded Process Compatible:No RoHS Compliant: No
STC12LE0254 Silver Mica Capacitor; Capacitance:470pF; Capacitance Tolerance:+/- 5%; Series:CDV30; Voltage Rating:2500VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:11.1mm; Leaded Process Compatible:No RoHS Compliant: No
STC12LE0254AD Silver Mica Capacitor; Capacitance:510pF; Capacitance Tolerance:+/- 5%; Series:CDV30; Voltage Rating:2500VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:11.1mm; Leaded Process Compatible:No RoHS Compliant: No
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