ASAHI KASEI
[AK4644]
MIC/LINE Input Selector
The AK4644 has input selector for MIC-Amp. When MDIF1 and MDIF2 bits are “0”, INL1-0 and INR1-0 bits select
LIN1/LIN2/LIN3 and RIN1/RIN2/RIN3, respectively. When MDIF1 and MDIF2 bits are “1”, LIN1, RIN1, LIN2 and
RIN2 pins become IN1−, IN1+, IN2+ and IN2− pins respectively. In this case, full-differential input is available (Figure
33). When full-differential input is used, the signal should not be input to the pins marked by “X” in Table 21.
MDIF1 bit MDIF2 bit
INL1 bit
INL0 bit
INR1 bit
INR0 bit
Lch
LIN1
LIN1
LIN1
LIN2
LIN2
LIN2
LIN3
LIN3
LIN3
LIN1
LIN3
IN1+/−
IN1+/−
IN1+/−
N/A
Rch
RIN1
RIN2
RIN3
RIN1
RIN2
RIN3
RIN1
RIN2
RIN3
IN2+/−
IN2+/−
RIN2
RIN3
IN2+/−
N/A
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
1
1
0
0
1
0
0
0
0
0
0
1
1
1
0
1
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
0
1
0
0
Default
Others
Table 20. MIC/Line In Path Select
Pin
Register
LIN1
IN1−
O
O
O
O
O
O
O
RIN2
IN2−
O
O
O
O
O
O
O
RIN1
IN1+
LIN2
IN2+
MIN
LIN3
VCOC
RIN3
AIN3 bit
MDIF1 bit MDIF2 bit
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
O
X
O
O
O
X
O
O
O
O
X
O
O
O
X
O
O
O
O
O
O
O
X
X
-
-
-
-
O
X
O
X
O
O
Table 21. Handling of MIC/Line Input Pins (“-“: N/A; “X”: Signal should not be input.)
MS0477-E-01
2006/10
- 36 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
