ak4373 ETC-unknow, ak4373 Datasheet - Page 66

• Manufacturer Part Number: ak4373
• Description: Low Power Stereo Dac With Hp/spk-amp
• Manufacturer: ETC-unknow

<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, the SPP pin is
placed in Hi-Z state and the SPN pin changes to HVDD/2 voltage. Power-save mode can reduce pop noise at power-up
and power-down.
MS0991-E-00
PMSPK
PMSPK bit
SPPSN bit
SPP pin
SPN pin
0
1
VSS2
VSS2
SPPSN
x
0
1
Figure 57. Power-up/Power-down Timing for Speaker-Amp
HVDD/2
Hi-Z
Table 45. Speaker-Amp Mode Setting (x: Don’t care)
>1ms
Normal Operation
Power-down
Power-save
Mode
- 66 -
Normal Operation
VSS2
Hi-Z
SPP
Normal Operation
HVDD/2
HVDD/2
Hi-Z
VSS2
SPN
>0
VSS2
VSS2
(default)
[AK4373]
2008/09