AK4118A Datasheet, PDF (16/56 Pages) Asahi Kasei Microsystems – High Feature 192kHz 24bit Digital Audio I/F Transceiver

[AK4118A]
When X’tal signal is the clock source, the clock can be output from the MCKO1 and MCKo2 pins. (Table 3)
No. OCKS1 OCKS0 MCKO1 MCKO2
X’tal
0
0
0
256fs
256fs
256fs
1
0
1
256fs
128fs
256fs
2
1
0
512fs
256fs
512fs
3
1
1
128fs
64fs
128fs
When CM1-0 bits = “01”, “11” or “10” and UNLOCK bit= “1”
fs (max)
96 kHz
96 kHz
48 kHz
192 kHz
(default)
Table 3. Master Clock Frequency Select (Stereo mode)
2) XMCK bit = “1”
The MCKO2 pin outputs the input clock of the XTI pin regardless of OCKS1-0 bit settings. DIV bit can set the output
frequency. The MCKO1 pin outputs the clock according to the CM1-0 and OCKS1-0 bit settings.
XMCK bit DIV bit MCKO2 Clock Source MCKO2 Frequency
1
0
X’tal
x1
1
1
X’tal
x 1/2
Table 4. MCKO2 pin Output Frequency Setting
■ Clock Operation Mode
The CM0/CM1 pins (or bits) select the clock source and the data source of SDTO. In Mode 2, the clock source is
switched from PLL to X'tal when PLL goes unlock state. In Mode3, the clock source is fixed to X'tal, but PLL is also
operating and the recovered data such as C bits can be monitored. For Mode2 and Mode3, it is recommended that the
frequency of X’tal is different from the recovered frequency from PLL.
Mode CM1 CM0 UNLOCK PLL
0
0
0
-
ON
X'tal
Clock source MCKO1 MCKO2 SDTO
ON(Note)
PLL
PLL
“L” RX
(default)
1
0
1
-
OFF
ON
X'tal
X’tal
X'tal DAUX
2
1
0
0
ON
ON
1
ON
ON
PLL
PLL
“L” RX
X'tal
X’tal
X'tal DAUX
3
1
1
-
ON
ON
X'tal
X’tal
X'tal DAUX
ON: Oscillation (Power-up), OFF: STOP (Power-Down)
Note: When the X’tal is not used as clock comparison for fs detection (i.e. XTL1/0 pins= “H”), the X’tal is off.
When the clock source is PLL in Mode 0 and Mode 2, the MCKO2 pin is fixed to “L”.
Table 5. Clock Operation Mode select
MS1130-E-02
- 16 -
2009/12