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參數資料
| 型號： | AK4665AEN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 20-Bit Stereo CODEC with MIC/HP-AMP |
| 中文描述： | 20位立體聲編解碼器麥克風/惠普腺苷 |
| 文件頁數： | 34/52頁 |
| 文件大?。?/td> | 541K |
| 代理商： | AK4665AEN |
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ASAHI KASEI
[AK4665A]
MS0440-E-01
2006/05
- 34 -
Charge Pump Circuit
The internal charge pump circuit generates negative voltage from HVDD voltage. The generated voltage is used to
headphone amplifier. When PMCP bit is set to “1”, the charge pump circuit is powered-up. All clocks (MCLK, BICK and
LRCK) should be supplied at this time. The power-up time of charge pump circuit depends on FS3-0 bits (Table 40).
FS3
FS2
FS1
FS0
fs
Power up time of
Charge Pump
Circuit
512/fs = 11.6ms
256/fs = 8.0ms
512/fs = 10.7ms
256/fs = 11.6ms
128/fs = 8.0ms
256/fs = 10.7ms
128/fs = 11.6ms
64/fs = 8.0ms
128/fs = 10.7ms
N/A
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
0
0
1
0
0
1
0
0
1
0
1
0
0
1
0
0
1
0
44.1kHz
32kHz
48kHz
22.05kHz
16kHz
24kHz
11.025kHz
8kHz
12kHz
N/A
Default
Others
Table 40. Power up time of Charge Pump Circuit
System Reset
The AK4665A should be reset once by bringing PDN pin “L” upon power-up. After exiting reset, all blocks (VCOM,
ADC, DAC, HPL, HPR, Lineout and charge pump circuit) switch to the power-down state. The contents of the control
register are maintained until the reset is done.
ADC exits reset and power down state after PMADC bit is changed to “1”, and then ADC is powered-up and the internal
timing starts clocking by LRCK edge. ADC is in power-down mode until MCLK and LRCK are input. DAC also exits
reset and power down state when MCLK and LRCK are input after PMDAC bit is changed to “1”.
相關PDF資料 |
PDF描述 |
|---|---|
| AK4671 | Stereo CODEC with MIC/RCV/HP-AMP |
| AK4671EG | Stereo CODEC with MIC/RCV/HP-AMP |
| AK4673 | Stereo CODEC with MIC/HP-AMP and Touch Screen Controller |
| AK4673EG | Stereo CODEC with MIC/HP-AMP and Touch Screen Controller |
| AK4682 | Multi-channel CODEC with 2Vrms Stereo Selector |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AK4666VQ | 功能描述:IC CODEC STEREO 20BIT LQFP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1,000 |
| AK4671 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP-AMP |
| AK4671_10 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP-AMP |
| AK4671EG | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP-AMP |
| AK4673 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP and Touch Screen Controller |
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