參數(shù)資料
型號: AK4343
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: Stereo DAC with HP/RCV/SPK-AMP
中文描述: 立體聲DAC惠普/垃圾車/胰腎聯(lián)合移植腺苷
文件頁數(shù): 62/98頁
文件大?。?/td> 851K
代理商: AK4343
ASAHI KASEI
[AK4343]
MS0478-E-01
2006/10
- 62 -
<Speaker-Amp Control Sequence>
Speaker-Amp is powered-up/down by PMSPK bit. When PMSPK bit is “0”, both SPP and SPN pin are in Hi-Z state.
When PMSPK bit is “1” and SPPSN bit is “0”, the Speaker-Amp enters power-save mode. In this mode, SPP pin is placed
in Hi-Z state and SPN pin goes to HVDD/2 voltage. Power-save mode can reduce the pop noise at power-up and
power-down.
PMSPK
SPPSN
Mode
0
x
Power-down
0
Power-save
1
1
Normal Operation
Table 56. Speaker-Amp Mode Setting (x: Don’t care)
SPP
Hi-Z
Hi-Z
SPN
Hi-Z
HVDD/2
Normal Operation
Default
Normal Operation
PMSPK bit
SPPSN bit
SPP pin
SPN pin
HVDD/2
HVDD/2
Hi-Z
Hi-Z
Hi-Z
Hi-Z
>1ms
>0
Figure 59. Power-up/Power-down Timing for Speaker-Amp
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