S32G2 Vehicle Network Processor - Clock
Configuration Guide
by: NXP Semiconductors
1. Introduction
NXP’s S32G2 is a family of high-performance
vehicle network processors that combines Controller
Area Network (CAN), Local Interconnect Network
(LIN), and FlexRay networking with high-data-rate
Ethernet networking. It also combines a functional
safe-core infrastructure with MPU cores and includes
high-level security features.
S32G2 supports multiple clock sources for clock
generation:
•
Fast Internal RC Oscillator (FIRC) (48 MHz)
•
Slow Internal RC Oscillator (SIRC) (32 KHz)
•
Fast External Crystal Oscillator (FXOSC) (20
– 40 MHz)
•
Phase-Locked Loops (PLLs)
•
Digital Frequency Synthesizer (DFS) modules
This application note is intended to provide the user
values for commonly used PLL/DFS configurations.
This document is accompanied with an attached clock
configurator - S32G2_Clock_Configurator.xlsx. The
calculator simplifies the clock configuration process
by helping user find the recommended and validated
values of PLL parameters (MFI, MFN and DIV), DFS
parameters (MFI and MFN), MC_CGM parameters
NXP Semiconductors
Document Number: AN13354
Application Notes
Rev. 1 , 11/2021
Contents
Introduction .................................................................... 1
PLL ................................................................................ 2
DFS ................................................................................ 4
Clock calculator design ................................................... 6
Options tab ........................................................... 6
Configuration tab.................................................. 7
Spread spectrum tab.............................................. 8
Clock calculator key considerations....................... 9
Spread Spectrum ........................................................... 10
Frequency modulation programming ................... 10
Spread Spectrum Considerations ......................... 11
Example code ..................................................... 12
Clock Configuration using S32DS Clocks Tool .............. 13
References .................................................................... 15
