AK4753 Datasheet, PDF (32/85 Pages) Asahi Kasei Microsystems – 2-in, 4-out CODEC with DSP Functions

[AK4753]
■ DSP Input Signals Setting
The AK4753 has three input sources for DSP. The inputs of digital, analog and mix signals can be changed by SEL1-0
bits. In the initialization, the setting is SEL1-0 bits = “00” (Analog Input).
SEL1-0 bits
Digital-in
MIX
SW1
DSP
Block
ADC
Figure 43. DSP Input source
SEL1 bit
0
0
1
1
SEL0 bit
DSP input source
Note
0
Analog
Default
1
Digital
0
MIX
(Analog source)/2 + Digital source/2
1
N/A
Table 18. DSP Input Setting (N/A: Not Available)
■ Bypass Mode
The AK4753 has a BYPASS pin for the DSP bypass mode. When the BYPASS pin is “L”, the DSP blocks are enabled.
When the BYPASS pin is “H”, the DSP blocks are disabled and the DATT outputs are skipped over the DSP blocks to
the DAC.
BYPASS pin
Mode
H
DSP Bypass Mode
L
Normal Operation
Table 19. Bypass Mode
BYPASS pin
“L”
DSP1
“L”
“H”
“H”
DAC1
DATT
L+R
2
MIX
“H”
“H”
DSP2
“L”
“L”
Figure 44. Bypass Mode
DAC2
MS1311-E-00
- 32 -
2011/07