[AK4753]
3. 2.1-channels mode (SPC1-0 bits = “10”: SW2 = “1”, SW3= “0”, SW4= “1”, SW5= “1”, SW6= “0”)
Table 22 shows the signal status and output condition when SPC1-0 bits = “10”. This output configuration is suitable
for a 2.1 channel application with a subwoofer. SW output is an example of the DSP setting.
L1(Hi), R1(Hi) are signals which were after HPF in DSP1. M(Lo) is signal which was after LPF in DSP2. Refer to the
Figure 55 for functions and signal paths of the DSP block.
SEL1-0 bit
SPC1-0 bit
0: L1, R1,
L1
DAC1L
ANA
+
SW2, 3, 4, 5, 6
L, R
SW3
0
DSP1
for L1, R1
L1, R1
DAC1
Digital-in
DIG
SW5
1
SW1
−
HPF, LPF
EQ, Limiter
DAC1R
ANA
R1
DATT
SW4
1
+ M
DSP2
for L2, R2
+
DAC2L
ANA
ADC
SW2
1
DAC2
DIG
HPF, LPF
EQ, Limiter
MIX
L+R
M =
SW6
0
M, M
−
2
DAC2R
ANA
− M
1: M, M
Figure 51. Block Diagram for Signal Path (SPC1-0 bits = “10”)
Output Setting
Signal and Output Block
Output
SPC1 bit
SPC0 bit Audio Signal
Polarity
DAC
Pin
non
non
+
DAC1L
DAC1R
DAC2L
DAC2R
LOUT1
ROUT1
LOUT2
ROUT2
L
R
SW+
SW−
L1(Hi)+R1(Hi)
1
0
M(Lo)
−
Table 22. 2.1-channels mode setting and Output Signal Status Details (SW: Subwoofer, M: Mono Mix)
Block1
LOUT1
ROUT1
L ch
R ch
2-channel
(Single-ended)
L1,R1→
Digital Source
Analog Source
Digital-in
Analog-in
AK4753
Block2
L ch
R ch
MOUT+
1-channel
(Full-differential)
M→
SW ch
MOUT
−
Figure 52. 2.1-channels Mode (SW: Subwoofer, M: Mono Mix)
MS1311-E-00
2011/07
- 37 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
