AK4753 Datasheet, PDF (37/85 Pages) Asahi Kasei Microsystems – 2-in, 4-out CODEC with DSP Functions

[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.
Digital-in
ADC
SEL1-0 bit SPC1-0 bit
SW1
SW2, 3, 4, 5, 6
L, R
0: L1, R1,
DSP1
for L1, R1
HPF, LPF
EQ, Limiter
L1, R1
SW3
0
DAC1
DIG
L1
+
DAC1L
ANA
SW5
−
DAC1R R1
1
ANA
DATT
M=
L+R
2
MIX
SW2
1
1: M, M
DSP2
for L2, R2
HPF, LPF
EQ, Limiter
SW4
1
+ DAC2L
+M
ANA
M, M
DAC2
DIG
SW6
−₀
DAC2R − M
ANA
Figure 51. Block Diagram for Signal Path (SPC1-0 bits = “10”)
Output Setting
SPC1 bit SPC0 bit
1
0
Signal and Output Block
Audio Signal Polarity DAC
L1(Hi)+R1(Hi)
non DAC1L
non DAC1R
M(Lo)
+
DAC2L
−
DAC2R
Pin
LOUT1
ROUT1
LOUT2
ROUT2
Output
L
R
SW+
SW−
Table 22. 2.1-channels mode setting and Output Signal Status Details (SW: Subwoofer, M: Mono Mix)
Digital Source
Analog Source
L ch
R ch
Digital-in
Block1
L1,R1→ ^LOUT1
ROUT1
AK4753
Block2
Analog-in
M→ ^MOUT+
MOUT−
L ch _2-channel
R ch ^{(Single-ended)}
SW ch ^1-channel
(Full-differential)
Figure 52. 2.1-channels Mode (SW: Subwoofer, M: Mono Mix)
MS1311-E-00
- 37 -
2011/07