AKD4955-A Datasheet, PDF (4/89 Pages) Asahi Kasei Microsystems – AK4955 Evaluation Board Rev.3

[AKD4955-A]
2) Setup the Audio I/F Evaluation Mode.
In case of using the AK4118A when evaluating the AK4955, both the AK4955 and AK4118A’s audio interface
formats must be matched.
Refer to the datasheet for AK4955’s audio interface format, and AK4118A’s audio interface format (Table 4).
The AK4118A operates at sampling frequency of 32 kHz or more. If the sampling frequency is slower than 32
kHz, please use other mode.
In addition, MCLK of AK4118A supports 256fs and 512fs. When evaluating in a condition except above, please
use other mode.
Refer to the datasheet for register setting of the AK4955.
(1) Evaluation of A/D using DIT of AK4118A.
(1-1) Setting with External Slave Mode
X1 (X’tal) and PORT2 (TOTX) are used. Nothing should be connected to PORT1 (TORX) and PORT3
(DSP).
MCKI, BICK and LRCK are supplied from the AK4118A, and SDTO of the AK4955 is output to the
AK4118A.
In addition, registers of the AK4955 should be set to “External Slave Mode” and setting of AK4118A should
be set to “Master Mode”.
SW4 (M/S) should be set to “ON (H)”.
JP10
XTI-SEL
JP11
BICK-SEL
JP12
JP13
BICK-PHASE LRCK-SEL
4
8
5
5
6
2
JP16
MCKI-SEL
4
8
5
Figure 4.Setting of jumper pins with External Slave Mode
(1-2) Setting with External Master Mode
X1 (X’tal) and PORT2 (TOTX) are used. Nothing should be connected to PORT1 (TORX) and PORT3
(DSP).
MCKI is supplied from the AK4118A, and BICK, LRCK and SDTO of the AK4955 is output to the
AK4118A.
In addition, registers of the AK4955 should be set to “External Master Mode” and setting of AK4118A
should be set to “Slave Mode”.
SW4 (M/S) should be set to “OFF (L)”.
JP10
XTI-SEL
JP11
BICK-SEL
JP12
JP13
BICK-PHASE LRCK-SEL
4
8
5
5
6
2
JP16
MCKI-SEL
4
8
5
<KM104703>
Figure 5.Setting of jumper pins with External Master Mode
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2011/08