Spread spectrum
S32G2 Vehicle Network Processor - Clock Configuration Guide, Rev. 1, 11/2021
NXP Semiconductors 11
Equation 2
where,
Equation 3
Frequency Modulation is only possible if the condition shown in the below equation is met –
Equation 4
The maximum possible modulation depth is:
REF
PLL_VCO
Equation 5
NOTE
The effective modulation depth may differ from the intended modulation
depth because of rounding operations applied to PLLFM[STEPSIZE] and
PLLFM[STEPNO].
5.2 Spread Spectrum Considerations
User must adhere to the below specification while using Spread Spectrum:
5.2.1 PLL VCO
The max frequency in case of center-spread SSCG enabled (
PLL_VCO
) for a modulation depth can be
selected as –
Equation 6
5.2.2 Modulation frequency
With center-spread SSCG enabled the modulation frequencies for Core, Accelerator and DDR must be
within the range as specified in the table below.
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