Hey anybody know what to make of this? (from the classified section) are they saying that you can't use the a/d converters in the pcm4222evm unless you use a special master clock, and that the 4222 is only good for working as a master clock for improving an external a/d interface? for ex: If I used the 4222 out to spdif > aroura lynx card, does that mean that the 4222 is just clocking the lynx card, and that the a/d is still being done by the chipset on the lynx?
somebody give insight, I orderd mine at the begining of the month an still havent got it (backordered)
Quote:
Originally Posted by Rochey  that clock input is not for wordclock.
It's for masterclock.22.5792MHz ±50ppm (or 24MHz)
Good luck generating that . 
/Rochey |
Quote:
Originally Posted by thermos Wow, really? Are you sure? I best be doing some reading.
Edit: here is what the literature says.
"An external clock source (EXT CLOCK), may be input at BNC connector J11 and is buffered by U19. The
buffer includes a tri-state output, so that it may be disabled when one of the crystal oscillators is used as
the master clock source. Buffer U19 is always operated from the +3.3V supply generated by voltage
regulator U22, and is tolerant to +5V input logic levels. The maximum external master clock frequency is
27.648MHz."
Also, heres the pdf if you feel like reading more. http://focus.ti.com/lit/ug/sbau124/sbau124.pdf |
Quote:
Originally Posted by Rochey so in other words, your racked version of the PCM4222 EVM can only be used as the clock master in the system. You'll also have to pin out the word clock the device creates.
Good luck. 
/Rochey |