Drive NOS AD1865/62,PCM1704/02/63,TDA1541 from FIFO: Universal I2S-PCM driver board

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merlin el mago

merlin el mago

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vzs said:
So all three leds from the converter are lit up or just the power? No, only lits the power LED

I suppose you:
- checked -without powering the units- that everything is connected and nothing shorts to ground Yes
- measured with your scope that you get the correct frequencies at each and every MCLK/SCK/CLK/WS/LLLR input and output pins I will do today
Click to expand...
 
merlin el mago

merlin el mago

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The U.FL with MCLK was not connected now LEDAUX LED is lit togheter the PWR LED, still I2S LED don't lit, attached pic with WS, SCK & MCLK arriving to the Driver NOS, obviously I can't measure nothing at LLLR & CLK Driver NOS output.
 

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iancanada

iancanada

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Real waveforms driving PCM1704 at 96 KHz and 192 KHz

I’m trying to replay the real case of merlin el mago on the last daughter board I keep.

Jumper settings: J24bit and JTAIL closed, all others open

MCLK was fixed at 24.576MHz

24 bit I2S generator was running at 96 KHz and 192 KHz

The screen shot was captured from my logic analyzer. Unfortunately I don’t have a PCM1794 DAC;).

Loop test confirmed bit perfect.

Maximal Fs was tested at 384 KHz, but MCLK has to be 49.152MHz or 98.304MHz with this frequency.

It seems OK from the waveform. Please let me know if you can find any problem.

Regards,

Ian
 

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V

vzs

Member
Joined 2005
iancanada said:
...
It seems OK from the waveform. Please let me know if you can find any problem...
Click to expand...
Waveforms seems OK from both format and timing point of view.

As far as clock modes are concerned I would recommend everyone to start with JCONT closed -continuous clock operation- . Only if this works try with JCONT open -stopped clock operation-

Regards,
Zsolt

p.s. I got my Amanero board and 45.xx/49.xx MHz clocks so I plan to try in 1-2 weeks the 8x mode :)
...too sad I missed a PCM1704 eval board on swap-meet
 
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merlin el mago

merlin el mago

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Joined 2009
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iancanada said:
Meaning of LEDs indicators on the daughter board :

No PWR: power fail

No LEDAUX with PWR: MCLK problem

No I2S with PWR and LEDAUX: I2S is wrong

Hope you can address the problem

Regards,

Ian
Click to expand...

Addressed the problem:) I reversed the Power with the MCLK at the WaveIO :headbash: now I have signal: tested with DVM AC, now is time to listening and to test if can play 192KHz.

Greetings
Felipe
 
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