ak4683 AKM Semiconductor, Inc., ak4683 Datasheet - Page 22

• Manufacturer Part Number: ak4683
• Description: Asynchronous Multi-channel Audio Codec With Dir/t
• Manufacturer: AKM Semiconductor, Inc.

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The AK4683 has one master clock output pin. The clock source can be selected from the three clocks (recovered clock
from DIR (RMCLK), X’tal clock (XTI) and external clock (MCLK2)). When the DIR is powered-down or unlocked
state at CM1/0 bit = “10”, the CLKDT bit selects the clock source. The OCKS1/0 bits select the clock speed. The 512fs
at fs=96kHz, 256fs/512fs at fs=192kHz are not available.
MS0427-E-02
Master Clock Output
Oscillator
MCLK2
(XTI)
X’tal
OCKS1 bit
MCKO1 bit
CM1 bit
0
0
1
1
0
0
1
1
0
0
1
1
OCKS1/0 bit
CLKDT bit
CLKDT bit
OCKS0 bit
PLL
Table 4. MCKO Clock Source Control
0
1
MCKO0 bit
CM0 bit
0
1
0
1
Table 1. Clock Mode Control
0
1
0
1
Table 2. EXTCLK Control
0
1
0
1
Table 3. MCLKO Speed
Figure 7. MCKO Clock
x2/3
Clock Source
MCLKO(RMCLK)
- 22 -
MCLK2
CKSDT bit
UNLOCK
XTI
MCKO Clock Source
256fs
256fs
512fs
128fs
RMCLK
EXTCLK
0
1
-
-
-
X’tal(XTI)
Reserved
MCLK2
DIR
CM0/1 bit
Default
Clock Source
EXTCLK
EXTCLK
EXTCLK
RMCLK
RMCLK
DIR
XTI
MCLK2
192 kHz
fs (max)
96 kHz
96 kHz
48 kHz
MCKO0/1 bit
default
MCKO
[AK4683]
2007/04