Forum Discussion

smile123's avatar
smile123
Icon for Occasional Contributor rankOccasional Contributor
2 years ago
Solved

arria 10 transciever calibration clock don't use clkusr

hello everyone: now,i have some issues with arria 10 transceiver calibration clock, on my test board, the clkusr is connected to gnd,but the transceiver calibration clock need 100mhz of clkusr p...
Fpga Devkit
  • smile123's avatar
    smile123
    2 years ago

    ok,thanks for your answer，now,i have Redesigned circuit。

Kshitij_Intel's avatar
Kshitij_Intel
Icon for Frequent Contributor rankFrequent Contributor
2 years ago

Hi,


As per user guide 7.3.2. CLKUSR (intel.com) it seems you cannot use it. Because For transceiver calibration, CLKUSR must be a free-running clock running between 100 MHz to 125 MHz at power-up depending on the device’s configuration scheme as shown in the following table. Transceiver calibration starts utilizing the CLKUSR during device configuration and may continue to use it even when the device enters user mode.

Note: CLKUSR cannot be used as the reference clock for PLL.


Thank you

Kshitij Goel


  • smile123's avatar
    smile123
    Icon for Occasional Contributor rankOccasional Contributor
    2 years ago

    thanks for your reply，if so,for transceiver calibration, it seems that must be provided a 100mhz clk on the clkusr pin？there are no other methods to solve this question,is this?

    Can I use a clock not from clkusr pin for calibration while in user mode that program is running?（use other pin input clock）