AKD4955-A Datasheet, PDF (6/89 Pages) Asahi Kasei Microsystems – AK4955 Evaluation Board Rev.3

[AKD4955-A]
(3) Evaluation of A/D, D/A using PORT3 (DSP).
(3-1) Setting with External Slave Mode
Registers of the AK4955 should be set to “External Slave Mode”.
SW4 (M/S) should be set to “ON (H)”.
AK4955
MCKO
MCKI
BICK
LR CK
SDTO
SDTI
256fs, 512fs or 1024fs
DSP or μP
MCLK
≥ 32fs
BCLK
1fs
LRCK
SDTI
SDTO
Figure 8.External Slave Mode
PORT3 (DSP) is used. Nothing should be connected to PORT1 (TORX) and PORT2 (TOTX).
MCLK, BICK, LRCK, and SDTI are input from PORT3 (DSP) and SDTO of the AK4955 is output to the
PORT3 (DSP).
JP11
BICK-SEL
JP12
JP13
BICK-PHASE LRCK-SEL
4
8
5
5
6
2
JP1４
ＭＣＫＩＯ
JP15
SDTI-SEL
JP16
MCKI-SEL
5
4
6
28
5
Figure 9.Setting of jumper pins with External Slave Mode (Note 2)
Note 2.JP12 (BICK-PHASE) is jumper which decides polarity of BICK, “THR” or “INV”
should be selected according to the Audio I/F format.
<KM104703>
-6-
2011/08