Twisted Pear S/PDIF WM8804 Transceiver Module on TDA1541A problem
Hi to all,
i would use the WM8804 to convert the S/PDIF to I2S (16bit). The I2S should feed my TDA1541A NOS DAC.
Unfortunately i have no sound output :( , independent if i set the I2S to 16 or 24 bit (AIFCONF0 1 or 0).
Malka07 use the same DAC pcb´s from me and have also no luck.
The connections are as follows:
LRCLK to TDA Pin1
BCK to TDA Pin2/4
Data to TDA Pin3.
Can someone help?
With my Teradak X2 USB to I2S converter, everything works fine!
Is there any output on the pins of the WM8804? Check for a LRCLK (pin15) at least.
Also, note that the datasheet has an example for 16-bit right-justified audio, not I2S. This bit me once trying to use a WM8805...
I don't know the twisted pear board sufficiently well to be of any other advice.
I've checked my setup(TP 8804 into TDA1541a NOS) and had a look at the TDA data sheet and it looks like pin27(OB/TWC) on the TDA has to be pulled high(connected to pin28/VDD/+5v) to allow it to accept multiplexed two's complement/I2S input. Might be worth checking in your setup.
thanks for the advice, but it is on the +5V line.
That´s the settings we use. On both 24Bit & 16Bit I2S no sound :(
I am using WM8805, WM8742, but I think this should be good to 8804
16bit I2S hardware
Can you please confirm there is at least LRCK signal? (if you have oscilloscope, that is). If you don't have oscilloscope, simply measure DC from LRCK to GND and report back. Measure DC with and without music playing.
Also, what are the status LEDs saying? All off?
Last thing which comes to mind: is the DAC powered from the same supply? If not, you might need to also connect the GNDs of the 2 boards?
I have the same dac as Oliver(Dvb-projekt) and am also having the same problem. I dont have an oscilloscope, but i measured dc from LRCK to GND with and without music playing and both times i got 1.64v.
All LEDs are green when a coax cable in connected to the dac regardless of if music is playing or not. If the coax is disconnected then all lights are red except non audio which remains green.
I have Gnd on my Twisted Pair board connected to Gnd on the dac board.
Pictures of the dac can be seen in this thread along with Board layouts etc...maybe that will help too.
Page 1 shows the board layouts....and page 31 onwards, are pics of my dac with the problems im having.
Thank you all, for your kind help...i really would like to get to the bottom of this, and im sure Oliver would too.
i´ve got an advice from John (ecdesigns) to our problem.
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