AK4137EQ Datasheet, PDF (31/65 Pages) Asahi Kasei Microsystems – 32bit SRC with PCM/DSD conversion

[AK4137]
■ SRC Bypass Mode
14. Functional Descriptions
In SRC bypass mode, when the AK4137 is in slave mode, SDTI input data is clocked in by ILRCK
and IBICK according to the audio interface format shown in Table 1. SDTO output data is clocked out
by OLRCK and OBICK according to the audio interface format shown in Table 4 and Table 5. OBICK
must be synchronized with IBICK but the phase is not critical. OLRCK must be synchronized with
ILRCK but the phase is not critical.
SDTI
ILRCK
IBICK
DSDIR
DSDIL
IDCLK
PDN
I2C
PSN
PCM
Input
Serial
Audio
I/F
DSD
Internal
OSC
UP/IF
REF
Internal
Regulator
SMUTE
Dither
PCM
Output
Serial
Audio
I/F
DSD
X’tal
OSC
Clock
Div.
SDTO/DSDOR
OLRCK/DSDOL
OBICK/ODCLK
MCKO
TEST1
TEST0
DVSS
DVDD
Figure 21. Bypass Mode (AK4137: PCMIN → PCMOUT)
Rev. 0.2
- 31 -
2014/06