Datasheet


SLES071B − MARCH 2003 − REVISED NOVEMBER 2006
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39
APPLICATION FOR DSD FORMAT (DSD MODE) INTERFACE
SCK
24
23
22
21
20
19
18
17
16
15
5
6
7
8
9
10
11
12
13
14
PCM1791A
RST
V
DD
DGND
AGNDF
V
CC
R
AGNDR
V
OUT
R−
V
OUT
R+
V
COM
MSEL
V
OUT
L−
ZEROL
ZEROR
V
CC
F
V
CC
L
V
OUT
L+
AGNDC
AGNDL
LRCK
1
2
3
4
BCK
DATA
MUTE
28
27
26
25
MS
MC
MDI
MDO
V
CC
C
Mode
Control
DATA-R
DATA-L
BIT Clock (n f
S
)
Analog
Output Stage
(Same as Standard
Application)
Analog
Output Stage
(Same as Standard
Application)
DSD Decoder
Figure 41. Connection Diagram in DSD Mode
Feature
This mode is used for interfacing directly to a DSD decoder, which is found in Super Audio CDt (SACD) applications.
The DSD mode is available by programming the following bit in the corresponding control register:
D DSD = 1 (register 20)
The DSD mode provides a low-pass filtering function. The filtering is provided using an analog FIR filter structure.
Four FIR responses are available, and are selected by the DMF[1:0] bits of control register 18.
The DSD bit must be set before inputting DSD data; otherwise, the PCM1791A erroneously detects the TDMCA
mode, and commands are not accepted through the serial control interface.
Super Audio CD is a trademark of Sony Kabushiki Kaisha TA Sony Corporation, Japan.