ak4561 AKM Semiconductor, Inc., ak4561 Datasheet - Page 30

• Manufacturer Part Number: ak4561
• Description: 16bit Codec With Built-in Alc And Mic/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n MIC BLOCK
MIC block includes 2-inputs selectors, Internal MIC or External MIC Mode can be selected by S0 bit. (Refer to Figure 11
and Figure 12)
When Internal MIC is selected, the phase of HPF-Amp is inverted.
Rev. 0.9
EXT_MIC_L
INT_MIC_L
EXT_MIC_L
INT_MIC_L
Figure 12. Internal path at selecting External MIC Mode (HPF OFF)
Figure 11. Internal path at selecting Internal MIC Mode (HPF OFF)
S0
S0
S0
S0
Pre Amp
Pre Amp
-
+
-
+
AKM CONFIDENTIAL
FUNCTION DETAIL
Inv Amp
-
+
Inv Amp
-
+
- 30 -
EQ Amp
EQ Amp
-
+
-
+
EQ
EQ
EXT
EXT
S1
S1
S0
S0
S1
S1
+
-
+
-
HPF
HPF
To ALC
From Rch
To Rch
To ALC
From Rch
To Rch
[AK4561]
2000/09