about xcvr_vccr_vcct_voltage set

[lambert_yu]

Hi all,

    I have one question:

     if the Vccr_GXB = 1.07v, so the xcvr_vccr_vcct_voltage is 1_0V or 1_1V? Which one will be the best setting? If I set xcvr_vccr_vcct_voltage to 1_0V is okay? For data rate = 12Gbps, will I need to set xcvr_vccr_vcct_voltage to 1_1V?

   FPGA TYPE : arria 10, 10ax115n2f45e1sg

Brs,

Lambert

[Deshi_Intel]

HI Lambert,

FPGA TYPE : arria 10, 10ax115n2f45e1sg

Quartus setting of 0.9V, 1.0V and 1.1V basically correspond to on board supply of 0.95V, 1.03V and 1.12V.

• 1.1V/1.12V setting is only applicable to GT channel only while I presume you are using GX channel

For GX channel, Transceiver speedgrade of 2, data rate = 12G,

• You should be using 1.03V as per A10 datasheet table 20 Transmitter and Receiver Data Rate Performance (page 25)
• https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/arria-10/a10_datasheet.pdf
• May I know why are you using 1.07V ?

In general, you can always refer to A10 datasheet doc for the guidance of correct transceiver power supply to be used.

Thanks.

Regards,

dlim

[lambert_yu]

Hi dlim,

    Thanks for your help,  just because I provide one  very close value to 1.06v(maximum, 1.07v just because of the power accuracy adjustment). And from your information, I got the indication of 0_9v, 1_0v, 1_1v, thanks.

Brs,

Lambert

[Deshi_Intel · Accepted solution]

Welcome.

So, if your on board power supply typical value is 1.03V and may fluctuate till max 1.06V/1.07v then maybe still fine but if your typical value is already 1.06v/1.07v then it's a bit high and out of recommended operation condition from Arria 10 datasheet.

[lambert_yu]

Thanks for your help.

[Deshi_Intel]

No problem !