The MPC5746R does not work at a 200 MHz main frequency

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The MPC5746R does not work at a 200 MHz main frequency

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Varian
Contributor I

I am currently developing with the MPC5746R (252-pin). I am using a graphical programming interface to initialize the project. I encountered a problem with the clock configuration. When using the default configuration with a 100 MHz core frequency, the chip works normally. However, when I increase the main frequency of the chip to 200 MHz, the chip stops working. Should I add a "wait cycle" setting during initialization? I hope to configure it using the library functions provided by the SDK. Thank you for your help!

Varian_0-1715819214799.png

One more thing: this image represents the default configuration, but the relationships between the numbers seem to be incorrect.

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petervlna
NXP TechSupport
NXP TechSupport

Hello,

I have just used the example from S32DS with SDK. Hello world. There is 200MHz default. It will working with no issues:

petervlna_0-1715845166090.png

Furthermore you can refer to chapter 23.7.2 Clock configuration of reference manual for correct calculation equations:

petervlna_1-1715845259590.png

And for example to this code, where I use 200MHz PLL of 20MHz XTAL.

https://community.nxp.com/docs/DOC-341615

Best regards,

Peter

 

 

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petervlna
NXP TechSupport
NXP TechSupport

Hello,

I have just used the example from S32DS with SDK. Hello world. There is 200MHz default. It will working with no issues:

petervlna_0-1715845166090.png

Furthermore you can refer to chapter 23.7.2 Clock configuration of reference manual for correct calculation equations:

petervlna_1-1715845259590.png

And for example to this code, where I use 200MHz PLL of 20MHz XTAL.

https://community.nxp.com/docs/DOC-341615

Best regards,

Peter