Hi,
I have the combination of ML605 and FMC230 from 4DSP. I am wondering what the correct way is to configure FMC230 into external reference mode based on this combination?
I am trying to configure FMC230 , through ML605, into external reference mode with an extern reference of 30.72MHZ, but it doesn't work. PLL is always not locked, and the FMC230 could not initialized correctly.
There are some efforts I did.
First, I configured the FMC230 into internal clock mode with the bitfile of ML605,the initialization sequence in reference application provided by 4DSP and a few settings on PC console( 1 ML605 0 0). Then, that worked.
After that, I moved to the next step and tried to configure FMC230 into external clock mode.
What I did included (1) plug an external reference clock into FMC230 through RI port. The clock is from signal generator and the frequency is 30.72MHZ(the same as that of internal reference) with the input level of 0dBm.
Then, I only switched the clock mode to the external reference mode(clock mode option is 2) on PC console. Except that, I didn't modify anything, strictly following the previous initialization sequence. But the mode didn't work, even though the software toolkit was updated to the latest version.
By the way, I saw another topic was also regarding the FMC230 issue, but the reply was not clear. Please provide more detailed information if possible.
Thanks,
Jerry