AKD4368 Datasheet, PDF (4/39 Pages) Asahi Kasei Microsystems – Evaluation board Rev.1 for AK4368

ASAHI KASEI
(3) EXT Slave Mode
AK4368
MCKO
MCKI
BICK
LRCK
SDATA
256fs, 512fs or 1024fs
DSP or µP
MCLK
≥ 32fs
BCLK
1fs
LRCK
SDTO
[AKD4368-A]
Figure 4. EXT Slave Mode
(3-1) In case of using DIR (Optical Link) <default>
PORT1 (DIR) is used. DIR generates MCLK, BICK, LRCK and SDATA from the received data through optical
connector (TORX176). Nothing should be connected to PORT3 (DSP) and J17. JP17(EXT)should be short.
CM0 and M/S should be set to “L” for SW1.
JP12
PHASE
JP13
BICK
JP16
MCLK
JP17
EXT
JP18
LRCK
JP19
SDTI
THR INV DIR ADC
DIR ADC DIR ADC
When the AK4114 is used, JP14 (MKFS) and JP15 (BCFS) are not used. Theerfore, JP14 (MKFS) should be
set to “x1” and JP15 (BCFS) should be set to “64fs”.
The AK4114 does not operate under fs = 32kHz. Therefore, this mode corresponds to fs = 32kHz and over.
(3-2) In case of connecting AK4368 with external DSP
PORT3 (ROM) is used. MCLK, BICK, LRCK and SDATA are supplied from PORT3. Nothing should be
connected to PORT1 (DIR). JP17(EXT) should be short.
JP12
PHASE
JP13
BICK
JP16
MCLK
JP17
EXT
JP18
LRCK
JP19
SDTI
THR INV DIR ADC
DIR ADC DIR ADC
When all interface signals are fed externally, JP14 (MKFS) and JP15 (BCFS) are not used. Therefore, JP14
(MKFS) should be set to “x1” and JP15 (BCFS) should be set to “64fs”.
JP12 (PHASE) is jumper which decides polarity of BICK, JP12 should be set to “THR” or “INV” according
to audio interface format.
<KM077800>
-4-
2005/02