AK4129 AKM [Asahi Kasei Microsystems], AK4129 Datasheet - Page 25

• Manufacturer Part Number: AK4129
• Description: 6ch 216kHz / 24-Bit Asynchronous SRC
• Manufacturer: AKM [Asahi Kasei Microsystems]

(3) SRC Bypass Mode
SRC bypass mode can be set in Synchronous inputs mode (INAS pin = “L”). Asynchronous inputs mode (INAS pin = “H”)
does not supports SRC bypass mode, so that the data is not transferred correctly on SDTI1→SDTO1, SDTI2→SDTO2,
and SDTI3→SDTO3 lines. In Asynchronous inputs mode (INAS pin = “H”), the AK4129 should be used in SRC mode.
When the AK4129 is in slave mode, SDTI1-3 data are input by the ILRCK1 and IBICK1 clocks in SRC bypass mode
(Table
IBICK and OBICK must be synchronized but the phase is not critical. ILRCK and OLRCK must be synchronized but the
phase is not critical.
MS1173-E-01
2). The SDTI1-3 data are output from the OLRCK and OBICK pins in a format shown in
IBICK1
ILRCK1
SDTI1
IBICK2
ILRCK2
SDTI2
IBICK3
ILRCK3
SDTI3
IMCLK
PDN
PM1
PM2
Figure 23. Bypass Mode in Slave Mode (Synchronous mode INAS pin = “L”)
CAD0
SPB
Audio
Serial
Audio
Serial
Audio
Serial
Input
Input
Input
uP
I/F
I/F
I/F
I/F
SDA
SCL
XTO
DEM
DEM
DEM
Internal
X 'tal
Osc
OSC
OMCLK/XTI
.
FIR
FIR
FIR
CM2 CM1 CM0
Clock
Div
- 25 -
SRC
SRC
SRC
SRC
SRC
SRC
Bypass
Bypass
Bypass
SRC
Bypass
SMUTE
Dither
SMUTE
Dither
SMUTE
Dither
Regulator
Internal
0.5 LSB
0.5 LSB
0.5 LSB
VD18
+
+
+
SRC1
SRC2
SRC3
REF
Output
Serial
Audio
I/F
OLRCK(I)
OBICK(I)
UNLOCK
SDTO1
OBIT1
OBIT2
ODIF1
ODIF0
SDTO2
SDTO3
MCKO
AVDD
VSS1
Table 6
and
[AK4129]
2010/09
Table
7.