Audio Output Connection
1-3
Description
sampling audio data interface, the interface signal can be connected at the
right side of the CN001 connector or at ext-xxxx of CN004 (not mounted).
1.4
Audio Output Connection
The audio output signal can be obtained on either the RCA stereo pin jacks
or the XLR connector. The audio output signal level and format are selected
by jumper, using the jumper connections listed in Section 1.5.5.
-
Connect RCA cables at either PJ-3 and PJ-5 (2 V rms, L ch/R ch) or PJ-2
and PJ-4 (4.5 V rms L ch/R ch) for stereo mode operation.
-
CN-M (XLR connector) is a 9-V rms mono output for the mono operation
mode of the PCM/DSD1792.
1.5
Configuration Control
1.5.1
DAI Receiver Data Format
Switches SW001 through SW003 are used to set the DAI receiver output audio
interface format as shown in Table 1−1. The initial (default) format of the
PCM1792/DSD1792 is I
2
S format.
Table 1−1. Digital Audio Receiver Configuration
SW001
SW002
SW003
Receiver Output Data Format
L
L
L
16- to 24-bit left-justified
L
H
L
16- to 24-bit l
2
S
H
L
H
16-bit right-justified (or standard)
L
H
H
18-bit right-justified (or standard)
1.5.2
Reset of DAI Receiver IC
Switch SW004 is a normally-open, momentary-contact pushbutton switch
used to reset the digital audio receiver when necessary.
1.5.3
DAI Interface Selection
The demonstration board also supports direct interfacing to audio decoders
and signal processors via connector CN004 (unpopulated). SCLK, BCK,
LRCK, and DATA are available and buffered by U005. Switch SW005 is used
to select between the digital audio receiver and connector CN004 as the
source of the audio interface. Table 1−2 shows the available switch settings.
Table 1−2. Digital Audio Source Selection
SW005 Setting
Source Selection
INT
Digital audio receiver (U002)
EXT
Connector CN004 via buffer U005
CN004 is not supplied. However, the board has the necessary wiring and holes
so that the user can mount the connector if desired.
