AK4584_01 Datasheet, PDF (20/53 Pages) Asahi Kasei Microsystems – 24Bit 96kHz Audio CODEC with DIT/DIR

ASAHI KASEI
[AK4584]
„ Master Clock Output
The AK4584 has two clock outputs, MCKO1 and MCKO2. These clocks are derived from either the recovered clock or the
X'tal oscillator. In PLL mode, the master clock output frequencies (MCKO1, MCKO2) are set by OCKS1-0 bits as shown
in Table 2. In the X’tal mode or external clock mode, the frequency of MCKO1 is the same as the X’tal or external clock.
MCKO2 outputs a half frequency of MCKO1 (Table 3). MCKO1 output can be disabled by the DMCK pin. MCKO1
output is “L” (Disable) when the DMCK pin = “H”, MCKO1 output is normal output when the DMCK pin = “L”. In PLL
mode, mode 0 does not support 96kHz. The default values of OCKS1-0 bits are “01”
Mode
0
1
2
3
OCKS1
0
0
1
1
OCKS0
0
1
0
1
MCKO1
512fs
256fs
128fs
64fs
MCKO2
256fs
128fs
64fs
32fs
fs
∼ 48kHz
∼ 96kHz
∼ 192kHz
∼ 192kHz
Table 2. Master Clock Output Frequency Select (PLL Mode)
Default
X’tal
MCKO1
MCKO2
11.2896MHz 11.2896MHz 5.6448MHz
12.288MHz 12.288MHz
6.144MHz
24.576MHZ 24.576MHz 12.288MHz
Table 3. Master Clock Output Frequency Select (X’tal Mode)
Table 4 is a connection example when using AK5394 and AK4394 in slave mode.
AK5394
AK4394
Clock Output
MCKO2
MCKO1
Normal Speed
256fs
512fs
Double Speed
128fs
256fs
Quad Speed
64fs
128fs
Table 4. Clock Select for AK5394 & AK4394
MS0118-E-00
- 20 -
2001/11