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參數(shù)資料
| 型號： | AK4633 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16-Bit Mono CODEC with ALC & MIC/SPK-AMP |
| 中文描述： | 16位單聲道編解碼器ALC的 |
| 文件頁數(shù)： | 31/82頁 |
| 文件大?。?/td> | 688K |
| 代理商： | AK4633 |
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ASAHI KASEI
[AK4633]
MS0447-E-03
2006/04
- 31 -
EXT Slave Mode (PMPLL bit = “0”, M/S bit = “0”)
When PMPLL bit is
“
0
”
and M/S bit is
“
0
”
, the AK4633 becomes EXT slave mode. Master clock is input from MCKI pin,
the internal PLL circuit is not operated. This mode is compatible with I/F of the normal audio CODEC. The clocks
required to operate are MCKI (256fs, 512fs or 1024fs), BICK (
≥
32fs) and FCK (fs). The master clock (MCKI) should be
synchronized with FCK. The phase between these clocks does not matter. The input frequency of MCKI is selected by
FS3-0 bits ( Table 11).
Mode
FS3-2 bits
FS1 bit
FS0 bit
MCKI Input
Frequency
256fs
1024fs
512s
256fs
Sampling Frequency
Range
7.35kHz
≤
fs
≤
48kHz
7.35kHz < fs
≤
13kHz
7.35kHz < fs
≤
26kHz
7.35kHz < fs
≤
48kHz
0
1
2
3
Don’t care
Don’t care
Don’t care
Don’t care
Table 11. Setting MCKI Frequency at EXT Slave Mode (PMPLL bit =
“
0
”
, M/S bit =
“
0
”
)
0
0
1
1
0
1
0
1
Default
External Slave Mode does not support Mode 0 (DSP Mode) of Audio Interface Format.
The S/N of the DAC at low sampling frequencies is worse than at high sampling frequencies due to out-of-band noise.
When the out-of-band noise can be improved by using higher frequency of the master clock. The S/N of the DAC output
through AOUT amp at fs=8kHz is shown in Table 12.
MCKI
S/N
(fs=8kHz, 20kHzLPF + A-weighted)
84dB
92dB
92dB
Table 12. Relationship between MCKI and S/N of AOUT
256fs
512fs
1024fs
The external clocks (MCKI, BICK and FCK) should always be present whenever the ADC or DAC or Programmable
Filter are in operation (PMADC bit =
“
1
”
or PMDAC bit =
“
1
” or
PMPFIL bit =
“
1
”
). If these clocks are not provided, the
AK4633 may draw excess current and it is not possible to operate properly because utilizes dynamic refreshed logic
internally. If the external clocks are not present, the ADC, DAC and Programmable Filter should be in the power-down
mode (PMADC bit =PMDAC bit = PMPFIL bit =
“
0
”
).
AK4633
DSP or
μ
P
MCKI
BICK
FCK
SDTO
SDTI
BCLK
FCK
SDTI
SDTO
MCKO
1fs
32fs, 64fs
MCLK
256fs, 512fs or 1024fs
Figure 21. EXT Slave Mode
相關PDF資料 |
PDF描述 |
|---|---|
| AK4640 | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4640VG | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4640VN | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4642EN | Stereo CODEC with MIC/HP/SPK-AMP |
| AK4643EN | Stereo CODEC with MIC/HP/RCV/SPK-AMP |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AK4633ENP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:LOW COST MONO CODEC WITH SPK A |
| AK4633VN | 制造商:AKM 制造商全稱:AKM 功能描述:16bit mono CODEC with MIC/SPK amplifier. |
| AK4633VNP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:LOW COST MONO CODEC WITH SPK A |
| AK4634 | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK-AMP |
| AK4635 | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP |
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