Visible to Intel only — GUID: mcn1441174531054
Ixiasoft
Visible to Intel only — GUID: mcn1441174531054
Ixiasoft
2.2.12.2. User Calibration
The I/O PLL must be recalibrated for any of the following conditions after device power up:
- Dynamic I/O PLL reconfiguration that changes the M or N counter settings is performed.
- Change of the reference clock frequency to the I/O PLL.
Recalibration is not necessary when using clock switchover to a secondary reference clock with a different frequency than the primary reference clock. The I/O PLL stores the calibration settings for both reference clocks after power-up calibration.
To perform the recalibration of the I/O PLL, you must enable the IOPLL Reconfig Intel® FPGA IP core to enable the recalibration mode.
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