[AK4675]
■ MIC Power
When PMMP bit = “1”, the MPWR pin supplies power for the microphone. This output voltage is typically 0.8 x AVDD
and the load resistance is minimum 0.5kΩ. In case of using two sets of stereo mic, the load resistance is minimum 2kΩ for
each channel. Any capacitor must not be connected directly to the MPWR pin (Figure 54).
PMMP bit
MPWR pin
Hi-Z
Output
0
1
(default)
Table 20. MIC Power
MIC Power
MPWR pin
Microphone
Microphone
Microphone
Microphone
LIN1 pin
RIN1 pin
LIN2 pin
RIN2 pin
Figure 54. MIC Block Circuit
MS0963-E-00
2008/05
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