Visible to Intel only — GUID: mcn1441173688934
Ixiasoft
Visible to Intel only — GUID: mcn1441173688934
Ixiasoft
2.2.12.1. Power-Up Calibration
After device power-up, the I/O manager automatically initiates the calibration process. The process continues during device programming.
You must enable the permit_cal signal from the IOPLL IP core to delay the power-up calibration in I/O PLL if the reference clock is not stable before device configuration. Set permit_cal = 0 upon power up until the reference clock is stable and operating at the correct frequency. Then, set permit_cal = 1 to initiate the power-up calibration. You must ensure that the permit_cal signal remains high once asserted.