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Setting Functions
1-7
Description
FMT1
FMT0 Input Data Format
L L 24-bit, left-justified, MSB-first
L H 24-bit, I
2
S (initial setting)
H L 24-bit, right-justified, MSB-first
H H 16-bit, right-justified, MSB-first
SW006: Switch for setting channel-status data of the DIT4096. Note that the OFF state
of this switch sets a HIGH level. Channel status data can set up if needed.
Moreover, it is also possible to connect a microcontroller to CN002 and to write
in channel-status data with the microcontroller. See the DIT4096 data sheet (TI
literature number SBOS225) for details about the contents of a setting.
SW051: Switch to select the S/PDIF output connector (optical/coaxial). An S/PDIF
output connector is chosen from optical (U052) and coaxial (CN058). The
optical and coaxial output terminals cannot be used simultaneously.
SW101: Switch for setting the functions of the PCM3010. All the functions of PCM3010
are set up with this switch. Functions that can be set are the audio serial data
I/O format, the DAC section de-emphasis, and power-down control.
FMT1 FMT0 DAC Input Data Format ADC Output Data Format
L L 24-bit, right-justified, MSB-first 24-bit, left-justified, MSB-first
L H 16-bit, right-justified, MSB-first 24-bit, left-justified, MSB-first
H L 24-bit, left-justified, MSB-first 24-bit, left-justified, MSB-first
H H 24-bit, I
2
S (initial setting) 24-bit, I
2
S (initial setting)
DEMP1 DEMP0 DAC De-Emphasis
L L De-emphasis ON, 44.1-kHz
L H De-emphasis OFF (initial setting)
H L De-emphasis ON, 48-kHz
H H De-emphasis ON, 32-kHz
PDOWN Power-Down Control
L Power-down mode
H Nomal operation (initial setting)
JP001: Setup of the crystal frequency and system clock for the DIR1703. When the
system clock and the frequency of the crystal for the DIR1703 are changed, a
shorting plug is inserted in only one position of JP001 according to the following
tables. In order to avoid the loss of a shorting plug which is not being used, the
plug is put in the header pin position labeled as OPEN. Because 24.576 MHz
is used for a quartz crystal and the system clock is set as the 256 f
S
output in
initial setting at the time of shipment, the shorting plug is attached in the CSBIT
position.