Intel® Agilex™ Clocking and PLL User Guide

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ID 683761
Date 3/26/2022
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6.3. IOPLL Reconfig IP Core Reconfiguration Modes

The IOPLL Reconfig IP core has four functional reconfiguration modes. The reconfiguration operation mode is based on the setting in the mgmt_address[9:8] bit.

Table 16.   IOPLL Reconfig IP Core Reconfiguration Modes
Reconfiguration Mode mgmt_address[9:8]
.mif streaming reconfiguration 2'b 00
Advanced mode reconfiguration 2'b 01
Clock gating reconfiguration 2'b 10
Dynamic phase shift reconfiguration 2'b 11

After performing dynamic reconfiguration on the I/O PLL that changes the M counter, N counter, bandwidth setting, or charge pump current, the I/O PLL must be recalibrated. For .mif streaming reconfiguration, the recalibration is done automatically. For advanced mode reconfiguration, you must manually trigger the recalibration of the I/O PLL. Recalibration is not needed for clock gating and dynamic phase shift reconfiguration.

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