02-18-2020 02:25 AM
I am trying to do 1G Ethernet PCS/PMA ,sfp transeivers.when I generate the pcs/pma soft ip core and after giving the gmii txd data.i am getting txdata as some other data that too even if i change the gmii txd data the value of txdata remains the same.what could i do.
02-18-2020 08:12 AM
02-19-2020 11:11 PM
what is the problem here my ref clk is 200mhz,and my brefclk is 125 mhz i used dcm to drive it but error saying that clk_125 (125mhz)from dcm cannot be drived in series.but i need that 125 mhz.
02-20-2020 12:17 AM
Hi @harik0412 ,
The error explains it all. Have you taken a look at the example design and modify it from there? Please do so as this is the best way to get started.
02-24-2020 10:39 PM
It looks like that there's no GT RXDATA.
Are GT TX/RXRESETDONE asserted?
You may try connecting TXP/TXN to RXP/N to do loopback test in simulation first.
02-24-2020 11:07 PM
02-24-2020 11:17 PM
If there's no RXDATA, SGMII can't link up. So TXDATA may be not able to send out.
You can try the IP core example design which includes the GT module.
02-28-2020 02:34 AM
If the block diagram goes like this,i gave the gmii tx and i expext a tx data but whatever the value for gmii_tx i gave the value of txdata remains same ie 50 and BC in hexadecimal.can u plz try this.just create this 1000 base x pcs/pma soft ip and give some gmii_txd and see what output u get in txdata