Spread spectrum
S32G2 Vehicle Network Processor - Clock Configuration Guide, Rev. 1, 11/2021
12 NXP Semiconductors
Table 4. Modulation frequency range with center-spread modulation enabled
Modulation frequency range
(KHz)
Spread Spectrum Clock Modulation
Frequency
5.2.3 Modulation depth
With center-spread SSCG enabled, the modulation depth for Core, Accelerator and DDR must adhere to
below conditions –
1.
2.
5.3 Example code
This section illustrates how to configure modulation frequency and modulation depth with the help of an
example.
Example: Enabling SSCG for CORE_PLL_VCO frequency of 2000 MHz (in case of SSCG disabled),
with modulation frequency of 64 KHz and 1.5% modulation depth.
Table 5. Example values
In the Spread Spectrum tab in the attached Excel tool, enter the following –
f
PLL_CORE_VCO
with SSCG disabled as 2000 MHz,
f
MOD
as 64 KHz,
MD % as 1.5
And select the FXOSC (f
REF
) frequency and RDIV from the drop list.
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