[AK4675]
MS0963-E-00
2008/05
- 68 -
ミ
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 0.5k
Ω
. In case of using two sets of stereo mic, the load resistance is minimum 2k
Ω
for
each channel. Any capacitor must not be connected directly to the MPWR pin (
).
PMMP bit
MPWR pin
0 Hi-Z
(default)
1 Output
Table 20. MIC Power
MPWR pin
≥
2k
Ω
MIC Power
Microphone
LIN1 pin
Microphone
RIN1 pin
Microphone
LIN2 pin
Microphone
RIN2 pin
≥
2k
Ω
≥
2k
Ω
≥
2k
Ω
Figure 54. MIC Block Circuit