AKD4634-A Datasheet, PDF (7/46 Pages) Asahi Kasei Microsystems – 16bit mono CODEC with MIC/SPK/VIDEO amplifier.

[AKD4634-A]
(4) Evaluation of loop-back mode (A/D → D/A) : EXT, Master Mode
a) Set up jumper pins of MCKI clock
Set “No.8 of SW3” to “H”. An external clock (256fs, 512fs or 1024fs) through a RCA connector (J8:
EXT/BICK) is supplied. JP23 (EXT1) and R26 should be properly selected in order to much the output
impedance of the clock generator.
JP17
XTE
JP21
MCLK_SEL
JP18
MKFS
XTL DIR EXT 256fs 512fs1024fs MCKO
b) Set up jumper pins of BICK clock
Output frequency (32fs or 64fs) of BICK should be set by “BCKO1-0 bit” in the AK4634.
There is no necessity for set up JP19.
JP19
BICK_SEL
JP20
BICK
JP27
BICK
JP29
BICK_INV
64fsɹ 32fs^ɹɹ16fs^ɹɹ EXT INV THR ^{DIR ADC} INV THR
c) Set up jumper pins of FCK clock
JP22
FCK_SEL
JP28
FCK
DIR ADC
2fs 1fs EXT
d) Set up jumper pins of DATA
When the AK4634 is evaluated by loop-back mode (A/D → D/A), the jumper pins should be set to the following.
JP30
SDTI
JP26
4632_SDTI
DIR
ADC
DAC/LOOP ^ADC
<KM088301>
-7-
2007/07