AK4558EN Datasheet, PDF (61/94 Pages) Asahi Kasei Microsystems – 108dB 216kHz 32Bit CODEC with PLL

[AK4558]
■ ADC/DAC Digital Filter
The ADC has four kinds of digital filter modes. SDAD and SLAD bits select ADC digital filter mode. The
default setting is SLAD bit = “0”, SDAD bit = “1” (Short delay Sharp Roll-Off Filter).
SLAD bit
0
0
1
1
SDAD bit ADC Filter Mode Setting
0
Sharp Roll-off Filter
1
Short delay Sharp Roll-Off Filter
0
Slow Roll-off Filter
1
Short delay Slow Roll-off Filter
Table 27. ADC Digital Filter Setting
(default)
The DAC has five kinds of digital filter modes. SSLOW, SDDA and SLDA bits controls digital filter mode.
When SSLOW bit = “1”, the setting of SDDA and SLDA bits is invalid. The default setting is SSLOW bit =
SLDA bit = “0”, SDDA bit = “1” (Short delay Sharp Roll-Off Filter).
When SSLOW bit = “1”, DATT cannot be used. When the PS pin = “H”, DAC digital filter is set to Short
delay Sharp Roll-Off Filter as default.
SSLOW bit
0
0
0
0
1
SLDA bit SDDA bit DAC Filter Mode Setting
0
0
Sharp Roll-off Filter
0
1
Short delay Sharp Roll-Off Filter
1
0
Slow Roll-off Filter
1
1
Short delay Slow Roll-off Filter
x
Super Slow Roll-Off Filter
Table 28. DAC Digital Filter Setting (x: Don’t care)
(default)
■ Mono/Stereo Switching
When the PS pin = “L” (“H”), PMADL and PMADR bits(pins) set mono/stereo ADC operation. When
changing ADC operation, PMADL and PMADR bits must be set “0” at first.
PMADL bit
0
0
1
1
PMADR bit ADC Lch data ADC Rch data
0
All “0”
All “0”
1
Rch Input Signal Rch Input Signal
0
Lch Input Signal Lch Input Signal
1
Lch Input Signal Rch Input Signal
Table 29. Mono/Stereo Switching
(default)
015004500-E-02
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2015/09