S32KのトピックS32K144 D-Flash and FlexRAM usage

S32K144 D-Flash and FlexRAM usage

paneri — Wed, 21 Apr 2021 07:11:31 GMT

Hi,

I am using s32k144 EVK board. I am trying to access FlexRAM memory 4kB and D-Flash memory 64kB in the same code. First I am writing data to FlexRAM, I checked in memory window the data is written but while writing data to D-Flash memory, in the memory window it is showing 0 which indicates data is not written to the D-Flash memory(Both memories I tried to access individual able to write/read data properly).
First I want to know whether it is possible to access both the memories from the same code?
If yes, please support how to achieve it. Kindly support.

Thanks & Regards,

Paneri

Re: S32K144 D-Flash and FlexRAM usage

danielmartynek — Wed, 21 Apr 2021 09:04:14 GMT

Hi Paneri,

I'm not sure if I understand.

What is the SIM_FCFG1[DEPART] value when you write to FlexRAM?

If the FlexRAM is used for the Emulated EEPROM, the FlexNVM flash block is not accessible by any master on the bus.

Best regards,

Daniel

Re: S32K144 D-Flash and FlexRAM usage

paneri — Wed, 21 Apr 2021 10:29:39 GMT

The DEPART value is 0x8.

Re: S32K144 D-Flash and FlexRAM usage

danielmartynek — Wed, 21 Apr 2021 10:46:56 GMT

Thank you Paneri,

DEPART = 0x8 means 0KB of DFlash and 64KB of EEPROM backup (E-Flash) that cannot be accessed by the core or the debugger, the E-Flash is not mapped:

Regards,

Daniel

Re: S32K144 D-Flash and FlexRAM usage

paneri — Wed, 21 Apr 2021 11:49:47 GMT

Thanks Daniel, for the information.