參數(shù)資料
型號(hào): AK4648EC
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): 73/119頁
文件大?。?/td> 1272K
代理商: AK4648EC
[AK4648]
MS0625-E-01
2007/06
- 73 -
<Wired OR with External Headphone-Amp>
When PMVCM=PMHPL=PMHPR bits = “0” and HPZ bit = “1”, Headphone-Amp is powered-down and HPL/R pins are
pulled-down to VSS2 by 200k
Ω
(typ.). In this setting, it is available to connect Headphone-Amp of the AK4648 and
external single supply Headphone-Amp by “wired OR” and the output level of external HP-Amp should be from “ -0.3V”
to “HVDD+0.3V”. In this mode, power supply current is 20
μ
A(typ.). This function is not supported in Pseudo Cap-less
Mode.
PMVCM
PMHPL/R
HPMTN
HPZ
x
0
x
0
0
0
x
1
1
1
0
x
1
1
1
x
Table 63. HP-Amp Mode Setting (x: Don’t care)
Mode
HPL/R pins
VSS2
Pull-down by 200k
Ω
VSS2
Normal Operation
Power-down & Mute
Power-down
Mute
Normal Operation
(default)
HPL pin
HPR pin
Headphone
AK4648
Another
HP-Amp
Figure 55. Wired OR with External Headphone-Amp
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