[AK4753]
■ DSP Block
Available setting of HPF, LPF and 5-programmable Biquads in Stereo mode, 2.1 channel mode and 4-channel mode are
shown in Table 28. HPF, LPF and 5EQ in Table 28 should be set carefully according to the frequency response of the
speaker which is actually used. The parameter of each setting can be set freely for application requests.
Output
Pin
DSP
setting
channel
Available setting channel
Mode
Stereo
Channel
L ch
Signal
HPF LPF
5 EQ
Pre-Gain
Limiter
Post-Gain
L1
Out1
Out2
Out3
Out4
L+
L−
R+
DSP1
DSP1
L1
R1
L1
R1
L1
R1
L1
L1
R1
R ch
R1
R1
R−
L(Hi)+
L(Lo)+
DSP1
DSP2
DSP1
DSP2
L1
(L2)
L1
(L1)
L2
(L1)
L2
L1
L2
L1
L2
L1
L2
L1
L2
L1
L2
L1
L2
L1
L2
L1
L2
Out1
Out2
Out3
Out4
L ch
R ch
L(Hi)−
L(Lo)−
R(Hi)+
R(Lo)+
(L2)
Stereo
(HPF, LPF)
DSP1
DSP2
DSP1
DSP2
R1
(R2)
R1
(R1)
R2
(R1)
R2
R1
R2
R1
R2
R1
R2
R1
R2
R1
R2
R1
R2
R1
R2
R1
R2
R(Hi)−
R(Lo)−
L(Hi)
(R2)
L ch
R ch
Out1
Out2
DSP1
DSP1
L1
R1
(L1)
(R1)
L1
R1
L1
R1
L1
R1
L1
R1
R(Hi)
2.1-channels
4-channels
Out3 M(Lo)+
Out4
SW ch
DSP2
(M)
M
M
M
M
M
M(Lo)−
L (Hi) ch
R (Hi) ch
L (Lo) ch
R (Lo) ch
Out1 L1(Hi)
Out2 R1(Hi)
Out3 L2(Lo)
Out4 R2(Lo)
DSP1
DSP1
DSP2
DSP2
L1
R1
(L2)
(R2)
(L1)
(R1)
L2
L1
R1
L2
R2
L1
R1
L2
R2
L1
R1
L2
R2
L1
R1
L2
R2
R2
Table 28. Available Settings for DSP and Signal Path of Each Speaker Configuration (SW: Subwoofer, M: Mono Mix)
HPF / LPF
Any coefficient
HPF/LPF:
1FA 19-0, 2FA 19-0
1FB 19-0, 2FB 19-0
1FC 19-0, 2FC 19-0
Figure 56. Digital HPF/LPF
MS1311-E-00
2011/07
- 41 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
