參數(shù)資料
型號: AK4648
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/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 113/119頁
文件大小: 1272K
代理商: AK4648
[AK4648]
MS0625-E-01
2007/06
- 113 -
(9)
Fall down the common voltage of headphone-amp: HPMTN bit = “1”
“0”
The fall time depends on HVDD and the capacitor value connected with the MUTET pin. When HVDD=3.3V
and the capacitor value is 1.0
μ
F
±
30%, the time constant is
τ
f
= 260ms(max.).
If the power supply is powered-off or headphone-Amp is powered-down before the common voltage goes to
VSS2, the pop noise occurs. It takes twice of
τ
f
that the common voltage goes to VSS2.
(10)
Power down headphone-amp: PMHPL = PMHPR bits = “1”
“0”
(11)
Power down DAC and MIN-Amp: PMDAC = PMMIN bits = “1”
“0”
(12)
Disable 5-band Equalizer: FBEQ bit = “1”
“0”
(13)
Disable the path of “DAC
HP-Amp”: DACH bit = “1”
“0”
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