Audio Data Interface; Audio Interface Format Selection; Emphasis Control - Texas Instruments DEM-PCM1793 User Manual

Audio Data Interface

Table 1−2. Audio Interface Format Selection
Switches FMT0, FMT1, and FMT2 select the audio interface format for the
PCM1793. The interface formats are listed in Table 1−2.
Table 1−3. De-Emphasis Control
Switches DEMP0 and DEMP1 select the sampling frequency for which
de-emphasis filtering is performed. The available frequencies are listed in
Table 1−3.
1.4 Audio Data Interface
CN001 on the daughter card selects the data interface. Available choices are
DSD by device type and PCM. The default setting is for the PCM audio data
interface with S/PDIF. The DSD interface can also be connected directly to this
connector.
1-4
FMT2 FMT1 FMT0
PIN 28 PIN 27 PIN 26
L L L
L L H
L H L
L H H
H L L
H L H
H H L
H H H
DEMP1 DEMP0
PIN 25 PIN 24
L L
L H
H L
H H
P-SCLK
MUTE
P-DATA
P-BCK
P-LRCK
FORMAT
16-bit standard format, right-justified
20-bit standard format, right-justified
24-bit standard format, right-justified
24-bit MSB-first, left-justified format
2
16-bit l S format
2
24-bit l S format
Reserved
Reserved
De-Emphasis Function
Disabled
48 kHz
44.1 kHz
32 kHz
DBCK
DSD-R
DSD-L
(DSD)
(DSD)