Texas Instruments manual Use of the DEM-DAI3010, Initial Setting at shipping, Power Terminal

Use of the DEM-DAI3010

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.

1.2.1Initial 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 fS
DIR1703 output audio data format	I2S
DIR1703 crystal clock frequency	24.576 MHz (load capacitance: 18 pF)
DIT4096 system clock (SCLK)	256 fS
DIT4096 input audio data format	I2S
PCM3010 system clock	Automatic selection (no setting required)
PCM3010 I/O audio data format	I2S
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)

1.2.2How 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 VCC = +5 V, +AVCC

=+15 V, –AVCC= –15 V, and two for ground) from stabilized dc power supplies. VDD (3.3 V) for the PCM3010 is normally generated by an onboard voltage-regulator IC from VCC (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 VCC and VDD 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

Description1-3