AK4589_1 Datasheet, PDF (26/76 Pages) Asahi Kasei Microsystems – 2/8-Channel Audio CODEC with DIR

ASAHI KASEI
[AK4589]
LRCK1
Fs
176.4kHz
192.0kHz
128fs
22.5792
24.5760
MCLK (MHz)
192fs
-
-
256fs
-
-
BICK1 (MHz)
64fs
11.2896
12.2880
Table 5. System Clock Example (Quad Speed Mode @Manual Setting Mode)
(Note: At Quad speed mode (DFS1= “1”, DFS0 = “0”) are not available for ADC.)
MCLK
512fs
256fs
128fs
Sampling Speed
Normal
Double
Quad
Table 6. Sampling Speed (Auto Setting Mode)
LRCK1
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
128fs
-
-
-
-
-
22.5792
24.5760
MCLK (MHz)
256fs
-
-
-
22.5792
24.5760
-
-
512fs
16.3840
22.5792
24.5760
-
-
-
-
Sampling
Speed
Normal
Double
Quad
Table 7. System Clock Example (Auto Setting Mode)
De-emphasis Filter
The AK4589 includes the digital de-emphasis filter (tc=50/15µs) by IIR filter. De-emphasis filter is not available in
Double Speed Mode and Quad Speed Mode. This filter corresponds to three sampling frequencies (32kHz, 44.1kHz,
48kHz). De-emphasis of each DAC can be set individually by register data of DEMA1-C0 bits (DAC1: DEMA1-0 bits,
DAC2: DEMB1-0 bits, DAC3: DEMC1-0 bits, DAC4: DEMD1-0 bits, see “Register Definitions”).
Mode
0
1
2
3
Sampling Speed
Normal Speed
Normal Speed
Normal Speed
Normal Speed
DEM1
0
0
1
1
DEM0
0
1
0
1
DEM
44.1kHz
OFF
48kHz
32kHz
Default
Table 8. De-emphasis control
Digital High Pass Filter
The ADC has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is 1.0Hz at fs=48kHz and
scales with sampling rate (fs).
MS0339-E-00
- 26 -
2004/09