AK4753 Datasheet, PDF (38/85 Pages) Asahi Kasei Microsystems – 2-in, 4-out CODEC with DSP Functions

[AK4753]
4. 4-channels mode (SPC1-0 bits = “11”: SW2 = “0”, SW3= “0”, SW4= “1”, SW5= “1”, SW6= “1”)
Table 23 shows the signal status and output condition when SPC1-0 bits = “11”. This output configuration is suitable
for a Two-Way Speaker System.
L1(Hi), L2(Lo), R1 (Hi) and R2 (Lo) is an example of the DSP setting. L1(Hi), R1(Hi) are signals which were after
HPF in DSP1. L2(Lo) and R2(Lo) are signals which were 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
+
DAC1L
L1
ANA
SW5
−
DAC1R R1
1
ANA
DATT
DSP2
SW2 for L2, R2
0
MIX
HPF, LPF
EQ, Limiter
0: L, R
SW4
1
+ DAC2L
L2
ANA
L2, R2
DAC2
DIG
SW6
− _{1 DAC2R R2}
ANA
Figure 53. Block Diagram for Signal Path (SPC1-0 bits = “11”)
Output Setting
SPC1 bit SPC0 bit
1
1
Signal and Output Block
Audio Signal Polarity DAC
L1(Hi)+R1(Hi)
non DAC1L
non DAC1R
L2(Lo)+R2(Lo) ^{non DAC2L}
non DAC2R
Pin
LOUT1
ROUT1
LOUT2
ROUT2
Singnal
L(Hi)
R(Hi)
L(Lo)
R(Lo)
Table 23. 4-channels Mode Setting and Output Signal Status Details
(Hi: High Frequency Signal, Lo: Low Frequency Signal)
Digital Source
Analog Source
L ch
R ch
Digital-in
Block1
L1,R1→ ^LOUT1
ROUT1
AK4753
Block2
Analog-in
L2,R2→
LOUT2
ROUT2
L(Hi) ch
R(Hi) ch
4-channel
(Single-ended)
L(Lo) ch
R(Lo) ch
Figure 54. 4-channels Mode and Output Bridge Configuration
(Example: Hi= High Frequency Signal, Lo= Low Frequency Signal are for Two-Way Speaker system.)
MS1311-E-00
- 38 -
2011/07