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參數(shù)資料
| 型號： | AD1888 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | FICHIER ROUGE |
| 中文描述： | 交流97 SoundMAX編解碼器 |
| 文件頁數(shù)： | 27/32頁 |
| 文件大小： | 312K |
| 代理商： | AD1888 |
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AD1888
–27–
DMIX[1:0]
Down Mix Mode Select. Provides analog down-mixing of the center, LFE, and/or surround channels into the
mixer channels. This allows the full content of 5.1 or quad media to be played through stereo headphones or
speakers.
Note that the Jack Sense pins can also be set up to control (gate) this function depending on the JS0DMX and
JS1DMX Bits (see Register 72h).
The upper bit allows forcing the down-mix function:
DMIX[1] = 0, no down-mix unless activated by the Jack Sense and JSxDMX bits (default).
DMIX[1] = 1, forces down-mix function.
The lower bit selects the down-mix type:
DMIX[0] = 0, selects 6-to-4 down-mix. The center and LFE channels are summed equally into the mixer left and
right channels (default).
DMIX[0] = 1, selects 6-to-2 down-mix. The surround left and right channels are summed into the mixer left and
right channels.
Default for DMIX[1:0] is 00.
HPSEL
Headphone Amplifier Input Select. This bit allows the headphone power amps to be driven from the surround
DACs or from the mixer outputs. There are two reasons for this: one is to allow 2-channel media to use the
higher power headphone amplifiers available on the SURR/HP_OUT outputs; the other is to allow spreading of
2-channel media to the surround outputs.
Together with the LOSEL bit (see above), this bit also provides for analog swapping of the mixer (front) and sur-
round outputs.
0 = SURR_OUT/HP_OUToutputs are driven by the surround DACs (reset default).
1 = SURR_OUT/HP_OUToutputs are driven by the mixer outputs.
CLDIS
Center and LFE Disable. Disables the center and LFE output pins, placing them into High-Z mode so that the
assigned output audio jack(s) can be shared for MIC inputs or other functions.
0 = Center and LFE output pins have normal audio drive capability (reset default).
1 = Center and LFE output pins are placed into High-Z mode.
LODIS
Line_out Disable. Disables the Line_out pins (L/R), placing them into High-Z mode so that the assigned output
audio jack can be shared for Line Input function.
0 = Line_out pins have normal audio drive capability (reset default).
1 = Line_out pins are placed into High-Z mode.
MSPLT
Mute Split. Allows separate mute control bits for master, HP, Line_in, CD, PCM OUT, and record volume/gain
control registers.
0 = Both left and right channel mutes are controlled by Bit D15 in the respective registers (reset default).
1 = Bit D15 affects only the left channel mute and Bit D7 affects only the right channel mute.
AC97NC
AC ’97 No Compatibility Mode. This bit allows the surround, center, and LFE volume control registers and
output attenuators to operate in a more functional mode than defined by the AC97 2.2 spec. This is called ADI
compatibility mode.
In AC ’97 compatibility mode, the DAC gain/attenuators for the surround, center, and LFE are controlled by
Register 18h (PCM volume). The output pin attenuators for the surround are controlled by Register 38h, and the
output pin attenuators for the center and LFE are controlled by Register 36h.
In ADI compatibility mode, the Surround DAC gain/attenuators are controlled by Register 38h, and the
Center/LFE DACs are controlled by Register 36h.
The output pin attenuators for Center/LFE are controlled by Register 02h (Master Volume), and the output pin
attenuators for Surround are controlled by Register 04h.
0 = AC97 compatibility mode (reset default).
1 = ADI compatibility mode.
DACZ
DAC Zero-Fill. Determines DAC data fill under starved condition.
0 = DAC data is repeated when DACs are starved for data (reset default).
1 = DAC data is zero-filled when DACs are starved for data.
相關PDF資料 |
PDF描述 |
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| AD1888JCP | FICHIER NOIR |
| AD1888JCP-REEL | DPI 4 MOULEE NOIRE |
| AD1888JST | CONNECTOR |
| AD1888JST-REEL | CONNECTOR |
| AD1888JSTZ | CONNECTOR COAXIAL BNC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD1888_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:AC 97 SoundMAX Codec |
| AD1888JCP | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 6DAC 20-Bit 48-Pin LFCSP EP Tray 制造商:Rochester Electronics LLC 功能描述:LOW COST 6 CHANNELL AC"97 AUDIO CODEC - Bulk |
| AD1888JCP-REEL | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 6DAC 20-Bit 48-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述:LOW COST 6 CHANNELL AC"97 AUDIO CODEC - Tape and Reel |
| AD1888JCPZ | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 6DAC 20-Bit 48-Pin LFCSP EP Tray |
| AD1888JCPZ-REEL | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 6DAC 20-Bit 48-Pin LFCSP EP T/R |
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