Spread-Spectrum Frequencies and Spread

Versal Adaptive SoC Clocking Resources Architecture Manual (AM003)

Document ID
AM003
Release Date
2023-05-16
Revision
1.5 English
Table 1. Spread-Spectrum Frequencies and Spread
SS_MODE Allowed Frequencies CLKFBOUT_MULT_F DIVCLK_DIVIDE Spread
CENTER_HIGH 100 MHz < Fin < 135 MHz 28 1 ± 1.82%
135 MHz < Fin <185 MHz 21 1 ± 2.44%
22 1 ± 2.32%
185 MHz < Fin < 275 MHz 28 2 ± 1.82%
275 MHz < Fin < 350 MHz 21 2 ± 2.44%
22 2 ± 2.32%
350 MHz < Fin < 550 MHz 21 3 ± 2.44%
22 3 ± 2.32%
CENTER_LOW 100 MHz < Fin < 135 MHz 56 2 ± 0.90%
135 MHz < Fin < 185 MHz 42 2 ± 1.20%
44 2 ± 1.15%
185 MHz < Fin < 275 MHz 56 4 ± 0.90%
275 MHz < Fin < 350 MHz 42 4 ± 1.20%
44 4 ± 1.15%
350 MHz < Fin < 550 MHz 42 6 ± 1.20%
44 6 ± 1.15%
DOWN_HIGH 100 MHz < Fin < 135 MHz 28 1 – 1.82%
135 MHz < Fin <185 MHz 21 1 – 2.44%
22 1 – 2.32%
185 MHz < Fin < 275 MHz 28 2 – 1.82%
275 MHz < Fin < 350 MHz 21 2 – 2.44%
22 2 – 2.32%
350 MHz < Fin < 550 MHz 21 3 – 2.44%
22 3 – 2.32%
DOWN_LOW 100 MHz < Fin < 135 MHz 56 2 – 0.90%
135 MHz < Fin < 185 MHz 42 2 – 1.20%
44 2 – 1.15%
185 MHz < Fin < 275 MHz 56 4 – 0.90%
275 MHz < Fin < 350 MHz 42 4 – 1.20%
44 4 – 1.15%
350 MHz < Fin < 550 MHz 42 6 – 1.20%
44 6 – 1.15%