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+--- Sujet : Filtrage Mini DSP ou Najda (/showthread.php?tid=5815)
RE: Filtrage Mini DSP ou Najda - Jean-Louis P - 01/10/2017
Aller, la doc WaveIO:
5. J6 - Header is for isolated I2S output signals �?
The NVE's IL715 isolator accept 5Vdc or 3.3Vdc power supply on the V+ pin to work
accordingly (please see the bottom of the card).
DT = I2S Data,
LR = I2S Word Clock,
BC = I2S Bit Clock,
MC = I2S Master Clock.
There are also 5 pins dedicated to isolated GND. They should be used.
Some words about I2S Master clock signal: it is provided in case that it's required by some DAC
chips like PCM1794 but there are few things to know before use this signal:
a) can be used to realign the WaveIO NON-isolated I2S output signals at the receiver's side
(DACs) by using a fast Flip-Flop clocked by this Master Clock signal.
b) it can only have two values: 22.5792 MHz or 24.576 MHz. The signal is picked-up right after
the oscillators so it is clean as much as it can be.
Attention: There will be NO signals at J5 pin-header connector (Isolated I2S Outputs) if there's
no voltage applied on the V+ and Isolated-GND pins (usually 3.3V but 5V is also accepted -
please see IL715 datasheet for more information).
RE: Filtrage Mini DSP ou Najda - HaH - 02/10/2017
Bonjour Jean-Louis,
Merci pour toutes ces précisions ! Avec toutes ces informations, je dois pouvoir me déterminer de la suite à donner à mon projet...