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Altgx 8/10

Altera_Forum
Honored Contributor II
1,081 Views

Hello all.  

 

I'm testing ALTGX in basic mode. I have a random pulses at output rx_errdetect and rx_disperr. And no valid data. The signals pll_locked, rx_pll_locked, and rx_freqlocked is high.  

I can't find problem. I'm do not use rx_analogreset, rx_digitalreset and rx_digitalreset. Can it be problem? I'm expect that 8/10 encoder/decoder mast be self-synchronized and no reset needed.
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3 Replies
Altera_Forum
Honored Contributor II
99 Views

If I disconnect tx from rx, rx_freqlocked goes down and rx_errdetect rx_disperr go stable up. What wrong with 8/10 decoder?

Altera_Forum
Honored Contributor II
99 Views

Are you sure you're getting valid 8b/10b data into the receiver?

Altera_Forum
Honored Contributor II
99 Views

 

--- Quote Start ---  

Are you sure you're getting valid 8b/10b data into the receiver? 

--- Quote End ---  

 

Yes. with loop-back option.  

 

I'm solve this problem. rx and tx interfaces must be reseting before operation. without reset it's won't work.
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