TLV320DAC3203EVM-K: hardware set up for external I2S signals

K.Yaita

Hi Team,

My customer considers to use TLV320DAC3203EVM-K + USB-MODEVM.
He wants to evaluate it with external I2S signals from another board.
Is it possible?
I would like to know hardware settings to achieve it.

Best Regards,
Yaita

over 5 years ago

0 Luis Fernando Rodriguez S. over 5 years ago

TI__Guru* 84915 points

Hi, Yaita-san,

The application is possible. The TLV320DAC3203EVM-K has many functionalities and it can be configured in multiple ways. In addition, the TLV320DAC3203EVM-K GUI has preconfigured codes that you may use in order to connect I2S signals from PC or even from another board.

I attached an example code for details.

High_Performance_Stereo_Playback.txt

###############################################
# High Performance Stereo Playback
# ---------------------------------------------
# PowerTune mode PTM_P3 is used for high
# performance 16-bit audio. 
#
# Audio is routed to headphone outputs.
###############################################



###############################################
# Software Reset
###############################################
#
# Select Page 0
w 30 00 00
#
# Initialize the device through software reset
w 30 01 01
#
###############################################



###############################################
# Clock Settings
# ---------------------------------------------
# The codec receives: MCLK = 11.2896 MHz,
# BLCK = 2.8224 MHz, WCLK = 44.1 kHz
###############################################
#
# Select Page 0
w 30 00 00
#
# NDAC = 1, MDAC = 2
w 30 0b 81 82
#
###############################################



###############################################
# Signal Processing Settings
###############################################
#
# Select Page 0
w 30 00 00
#
# Set the DAC Mode to PRB_P8
w 30 3c 08
#
###############################################



###############################################
# Configure Power Supplies
###############################################
#
# Select Page 1
w 30 00 01
#
# Disable weak AVDD to DVDD connection
w 30 01 08
#
# Enable Master Analog Power Control
w 30 02 00
#
# Set the input power-up time to 3.1ms
w 30 47 32
#
# Set the REF charging time to 40ms
w 30 7b 01
#
###############################################



###############################################
# Configure DAC Channel
###############################################
#
# Select Page 1
w 30 00 01
#
# De-pop: 5 time constants, 6k resistance
w 30 14 25
#
# Route LDAC/RDAC to HPL/HPR
w 30 0c 08 08
#
# Select Page 0
w 30 00 00
#
# DAC => 0dB
w 30 41 00 00
#
# Power up LDAC/RDAC
w 30 3f d6
#
# Select Page 1
w 30 00 01
#
# Unmute HPL/HPR driver, 0dB Gain
w 30 10 00 00
#
# Power up HPL/HPR
w 30 09 30
#
# Select Page 0
w 30 00 00
#
# Unmute LDAC/RDAC
w 30 40 00
#
###############################################

I hope this helps. Please let me know if you have additional questions or comments.

Best regards,
Luis Fernando Rodríguez S.

0 K.Yaita over 5 years ago in reply to Luis Fernando Rodriguez S.

Guru 29700 points

Hi Luis-san,

Thank you for your reply.
Could you tell me hardware settings with external I2S signals from another board?
I believe R24~R27 should be removed then apply external I2S signals to TP36~TP39.
Is my understanding correct?

Best Regards,
Yaita

0 Luis Fernando Rodriguez S. over 5 years ago in reply to K.Yaita

TI__Guru* 84915 points

Hi, Yaita-san,

There's no need to remove the 0-ohm resistors. I would recommend the following procedure:

1.- Disable the I2S and MCLK signals from the USB port with the help of SW2 4-5. This will avoid collision in the I2S lines if external clock signals are connected.

2.- Connect the external clock signals to J14 as shown in the following diagram:

3.- Enable the external clock signals and verify its operation with the help of a scope on the clock test points of the EVM (TP35 - TP39).

Please try it and let me know if you have questions or comments about this.

Best regards,
Luis Fernando Rodríguez S.

0 K.Yaita over 5 years ago in reply to Luis Fernando Rodriguez S.

Guru 29700 points

Hi Luis-san,

Thank you always for your kind support!
I will have my customer try as you suggested.

Best Regards,
Yaita

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TLV320DAC3203EVM-K: hardware set up for external I2S signals