about flexVNM partition

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about flexVNM partition

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814420552
Contributor II

hello,

   1.what 's the partition information anbout flexNVM default? all space is data flash or EEPROM back up?

    2. The following example is NXP example in SDS install directory, 

         <1> SIM->FCFG register  load the flexNVM partition information automally form IFR?  so if  partitioned this register will load the partition information when reset ? 

         <2>because the flexNVM is used for EEPROM backup at this time why memory window disiplay "00000000" not display "???"     ?    according to manual reference it should display "????"

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Alexis_A
NXP TechSupport
NXP TechSupport

Hello Kui Wu,

Please check my answers bellow:

1.what 's the partition information about flexNVM default? all space is data flash or EEPROM back up?

Is neither of these options, as it mentions in the reference manual for the S32K, by default, the value of this register is not valid, so you will need to use the partition command first before using this section.

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<1> SIM->FCFG register  load the flexNVM partition information automatically form IFR?  so if partitioned this register will load the partition information when reset? 

That's right. After you use the partition command, this configuration will stay in memory from the beginning of your application.

<2>because the flexNVM is used for EEPROM backup at this time why memory window display "00000000" not display "???"?    according to manual reference, it should display "????"

If you check in other memory regions outside the memory map they will also appear as filled with 0's

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