Is the flash driver for MK64FX512 incorrect?

[yorknh]

Either I am misunderstanding the SRAM available on on an MK64FX512xxx12 or  FTFE_4K.cfx is incorrect. I am using MCUXpresso 10.2.1 and SDK 2.4.2. When I look at the memory settings in the SDK it shows all of the FN variants with 1M of flash and 256K ram. All of the FX variants show 512K of flash and 192K ram. This of course shows up in the MCU settings with the size of SRAM_UPPER only being 0x20000 when I think it should be 0x30000.

[danielchen]

HI Larry：

Please refer to the SRAM sizes for the K64 Sub-Family.

For MK64FX512, SRAM_U size is 128 K,  (0x20000)

                             SRAM_L size is 64K.     (0x10000)

Regards

Daniel

[yorknh]

Hi Daniel,

According to Arm® Cortex®-M4|Kinetis® K64 120 MHz 32-bit MCUs|NXP 

and https://community.nxp.com/message/984150?q=k64%20sram 

That page you show is incorrect.

Larry

[danielchen · Accepted solution]

Hi Larry:

Thank you, the page I showed is the reference manual , version 2, 2014. Sorry, I do not update to version 3.

It seems an issue for the SRAM upper size. I have reported this to the software team.

Thanks a lot.

Regards

Daniel