Reference code to handle ECC errors in S32K144 Flash Memory (P-Flash, FlexNVM, FlexRAM)

NJ_NXP — Fri, 19 Jun 2026 06:58:57 GMT

Hello NXP Community,

I am implementing safety mechanisms on the S32K144 and need reference code for non-correctable (double-bit) ECC errors, alongside a method to inject them for testing.

1. Double-Bit Handling

I need code examples to catch double-bit faults across:

P-Flash & FlexNVM:
FlexRAM (EEE): Detecting faults during background copies.
Exception Handlers: A BusFault or HardFault ISR routine to isolate the failing memory address.

2. Error Injection

What is the recommended way to simulate a double-bit fault in the Flash memory arrays?

Any code snippets would be highly appreciated.

Re: Reference code to handle ECC errors in S32K144 Flash Memory (P-Flash, FlexNVM, FlexRAM)

danielmartynek — Fri, 19 Jun 2026 10:52:13 GMT

Hi @NJ_NXP,

If you are using RTD drivers, refer to the Integration Manual for the S32K1/S32M24x FLS Driver (RTD_FLS_IM.pdf), specifically Section 10.4.1 – ECC Management on Internal Flash.
The document can be found in the RTD installation directory, for example for RTD 3.0.0_QLP02:
SW32K1_S32M24x_RTD_4.4_3.0.0_QLP02\eclipse\plugins\Fls_TS_T40D2M30I0R0\doc\

Regarding FlexRAM, it does not implement ECC. However, if a double-bit error is detected during a copy-down operation, the EEPROM record is read as all 1s.
For more details, see application note AN11983 – Using the S32K1xx EEPROM Functionality:
https://www.nxp.com/docs/en/application-note/AN11983.pdf

The fault can be emulated in the flash controller by setting the FERCNFG[FDFD] bit and then performing a flash read.
Alternatively, the fault can be generated by reprogramming an already programmed flash phrase and subsequently reading it.

Regards,

Daniel

S32KのトピックReference code to handle ECC errors in S32K144 Flash Memory (P-Flash, FlexNVM, FlexRAM)

Reference code to handle ECC errors in S32K144 Flash Memory (P-Flash, FlexNVM, FlexRAM)

Re: Reference code to handle ECC errors in S32K144 Flash Memory (P-Flash, FlexNVM, FlexRAM)