參數(shù)資料
型號(hào)： AK4642EN
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： Stereo CODEC with MIC/HP/SPK-AMP
中文描述： 立體聲編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù)： 27/83頁
文件大?。?/td> 670K
代理商： AK4642EN
ASAHI KASEI
[AK4642EN]
MS0420-E-00
2005/09
- 27 -
PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
A reference clock of PLL is selected among the input clocks to MCKI, BICK or LRCK pin. The required clock to the
AK4642 is generated by an internal PLL circuit. Input frequency is selected by PLL3-0 bits (see Table 4).
a) PLL reference clock: MCKI pin
BICK and LRCK inputs should be synchronized with MCKO output. The phase between MCKO and LRCK dose not
matter. MCKO pin outputs the frequency selected by PS1-0 bits (see Table 9) and the output is enabled by MCKO bit.
Sampling frequency can be selected by FS3-0 bits (see Table 5).
AK4642
DSP or
μ
P
MCKO
BICK
LRCK
SDTO
SDTI
BCLK
LRCK
SDTI
SDTO
MCKI
1fs
≥
32fs
11.2896MHz, 12MHz, 12.288MHz
13.5MHz, 24MHz, 27MHz
MCLK
256fs/128fs/64fs/32fs
Figure 14. PLL Slave Mode 1 (PLL Reference Clock: MCKI pin)
b) PLL reference clock: BICK or LRCK pin
Sampling frequency corresponds to 7.35kHz to 48kHz by changing FS3-0 bits (see Table 6).
AK4642
DSP or
μ
P
MCKI
BICK
LRCK
SDTO
SDTI
BCLK
LRCK
SDTI
SDTO
MCKO
1fs
32fs, 64fs
Figure 15. PLL Slave Mode 2 (PLL Reference Clock: LRCK or BICK pin)
The external clocks (MCKI, BICK and LRCK) should always be present whenever the ADC or DAC is in operation
(PMADL bit = “1”, PMADR bit = “1” or PMDAC bit = “1”). If these clocks are not provided, the AK4642 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 and DAC should be in the power-down mode (PMADL=PMADR=PMDAC bits = “0”).
相關(guān)PDF資料
PDF描述
AK4643EN Stereo CODEC with MIC/HP/RCV/SPK-AMP
AK4645EZ Stereo CODEC with MIC/HP-AMP
AK4645 Stereo CODEC with MIC/HP-AMP
AK4646EZ Stereo CODEC with MIC/SPK-AMP
AK4646 Stereo CODEC with MIC/SPK-AMP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4642VN 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ???￡ Stereo CODEC with MIC/HP/SPK-AMP
AK4643 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with built-in MIC/HP/RCV/SPK amplifier
AK4643EN 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP/RCV/SPK-AMP
AK4644 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with built-in MIC/HP/RCV amplifier
AK4644EN 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP/RCV-AMP
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