參數(shù)資料
型號: AK4538VN
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16Bit DS CODEC with MIC/HP/SPK-AMP
中文描述: 16位副編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 32/70頁
文件大?。?/td> 485K
代理商: AK4538VN
ASAHI KASEI
[AK4538]
MS0198-E-01
2003/5
- 32 -
n
BEEP Input
When the BMBPS bit is set to “1”, the stereo beep input is powered up. And when the BPSHP bit is set to “1”, the input
signals from the BEEPL and BEEPR pins are mixed to Headphone outputs. When the BPSSP bit is set to “1”, the signal of
(BEEPL + BEEPR)/2 is input to Speaker-amp. When the BMBPM bit is set to “1”, mono beep input is powered up. And
when the BPMHP bit is set to “1”, the input signal from the BEEPM pin to Headphone-amp. When the BPMSP bit is set to
“1”, the signal from the BEEPM pin is input to Speaker output. The external resisters Ri adjust the signal level of each
BEEP input that are mixed to Headphone and Speaker outputs.
The signal from the BEEPM pin is mixed to the Headphone-amp through a –20dB gain stage. The signal from the BEEPM
pin is mixed to the Speaker-amp without gain. The internal feedback resistance is 20k
±
30%
.
BEEPL
Ri
Rf = 20k
BEEPR
Ri
Rf = 20k
AK4538
BEEPM
Ri
Rf = 20k
BPMHP
SPK
MIX
HPL
MIX
HPR
MIX
BPSHP
BPSHP
-20dB
BPMSP
BPSSP
1/2
1/2
Figure 25. Block Diagram of BEEP pins
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