- TEXAS INSTRUMENTS DAV Digital Audio/Speaker User's Guide DEM-DAI3010
Use of the DEM-DAI3010
1-3
Description
1.2 Use of the DEM-DAI3010
The DEM-DAI3010 is shipped with standard settings preset. Therefore,
connecting power supplies (15-V, –15-V and 5-V) is the only requirement to
prepare the board for use, unless nonstandard settings are desired.
1.2.1 Initial Settings of the DEM-DAI3010 (at shipping)
Table 1–1.Initial Settings of the DEM-DAI3010 at Shipping
Item Initial Setting (at shipping)
Power supply voltage 15 V, –15 V, and 5 V (close CN57)
Power supply terminals CN51–CN55 (open CN56)
Connection of PCM3010 and S/PDIF I/O DIR1703 and DIT4096 connected with JP107
DIR1703 system clock (SCK) 256 f
S
DIR1703 output audio data format I
2
S
DIR1703 crystal clock frequency 24.576 MHz (load capacitance: 18 pF)
DIT4096 system clock (SCLK) 256 f
S
DIT4096 input audio data format I
2
S
PCM3010 system clock Automatic selection (no setting required)
PCM3010 I/O audio data format I
2
S
PCM3010 power-down function Disabled
PCM3010 de-emphasis function (DAC) Disabled
PCM3010 DAC cutoff frequency 54 kHz (JP101–JP104 are closed)
PCM3010 ADC input terminal selection CN101, CN102: 2-V rms input (with LPF)
1.2.2 How to Connect Power Supplies to the DEM-DAI3010
The DEM-DAI3010 requires 5-V, 15-V, and –15-V power supplies. Power is
supplied to this board by five binding posts (one each for V
CC
= +5 V, +AV
CC
= +15 V, –AV
CC
= –15 V, and two for ground) from stabilized dc power supplies.
V
DD
(3.3 V) for the PCM3010 is normally generated by an onboard
voltage-regulator IC from V
CC
(5 V), but it is possible to supply 3.3 V directly.
To do so, open CN057, then supply 3.3 V to CN056 and 5 V to CN054. If 3.3
V is supplied externally, 5 V must still be provided to CN054 in order to supply
the analog section of the PCM3010. To avoid latch-up of the PCM3010, ensure
that V
CC
and V
DD
are powered up simultaneously.
Table 1–2.Power Supply Terminals and Supply Voltage (Depending on CN057 Setting)
Power Terminal CN057 Closed (Default) CN057 Open
CN051 (orange) 15 V 15 V
CN052 (green) 0 V (ground) 0 V (ground)
CN053 (blue) –15 V –15 V
CN054 (red) 5 V 5 V
CN055 (black) 0 V (ground) 0 V (ground)
CN056 (2-pin connector) Open (no connection) 3.3 V