AKD4621-B Datasheet, PDF (5/50 Pages) Asahi Kasei Microsystems – AK4621 Evaluation board Rev.2

[AKD4621-B]
2) Evaluation of D/A using DIR. (Optical link)
The DIR generates MCLK, BICK, LRCK and SDATA from the received data through optical
connector (PORT1). PORT1 is also used for the evaluation using such as CD test disk.
BNC connector is recommended for an evaluation of the Sound quality.
2-1) DIR input interface (Default: JP2 (RX3)="OPT")
Jumper
JP2
(RX3)
Normal Speed & Double Speed
OPT (Default) or BNC
Quad Speed
BNC
Table 8. DIR Input Interface
2-2) Sampling speed & MCLK frequency
a) Parallel mode (Default)
SW1-1
(P/S)
ON
ON
ON
SW1-4 SW1-6 SW1-7 SW3-4 SW3-5
(DFS0) (CKS1) (CKS0) (OCKS1) (OCKS0)
Sampling
Speed of
AK4621
MCLK
Frequency of
AK4621
OFF OFF OFF
OFF
OFF
Normal
Speed
256fs
OFF OFF ON
ON
OFF
Normal
Speed
512fs
ON OFF ON
OFF
OFF
Double
Speed
256fs
Table 9. Sampling Speed & Master clock Frequency in parallel mode
(Default)
* Parallel mode does not support quad speed mode.
b) Serial mode
SW1-1
(P/S)
OFF
OFF
OFF
OFF
DFS1
bit
0
0
0
1
DFS0 CMODE CKS1 CKS0 SW3-4 SW3-5
bit
bit
bit bit (OCKS1) (OCKS0)
Sampling
Speed of
AK4621
0
0
0
0
OFF
OFF
Normal
Speed
0
0
0
1
ON
OFF
Normal
Speed
1
0
0
1
OFF
OFF
Double
Speed
0
0
0
1
ON
ON Quad Speed
Table 10. Sampling Speed & Master clock Frequency in serial mode
MCLK
Frequency of
AK4621
256fs
512fs
256fs
128fs
* In serial mode, SW1-4 (DFS0), SW1-6 (CKS1) and SW1-7 (CSK0) should be always “OFF”, and DFS1, DFS0, CKS1,
CKS0 and CMODE bits in the AK4621 should be set via the printer port (PORT3).
<KM100802>
-5-
2010/12