topic Re: Flash Error Injection methods on MPC5674F in MPC5xxx

Flash Error Injection methods on MPC5674F

youngseolee — Tue, 26 Sep 2017 00:21:56 GMT

hi threre,

i have a question about Flash error injection methods on MPC5674F.

in the reference menual of MPC5674F, a ECSM(error correction status module) do not support Flash error injection bits.

I need the flash error injection function, is there any way I can do it?

please answer,

Re: Flash Error Injection methods on MPC5674F

davidtosenovjan — Tue, 26 Sep 2017 08:37:34 GMT

Hi, it can be done by flash over-programming. Pay attention to AN5200, section 5.2:

AN5200 - Error Correcting Codes Implemented on MPC55xx and MPC56xx

and its example 4 or 5:

Example MPC5643L 2b RAM and 2b FLASH ECC error injection CW210

https://community.nxp.com/docs/DOC-105443

Or you may see following one:

Example MPC5777C-1b+2b_FLASH_ECC_error_injection GHS614

Re: Flash Error Injection methods on MPC5674F

youngseolee — Tue, 26 Sep 2017 10:58:07 GMT

Hi, david

I have been implemented a non-correctable error injection code on the MPC5675F with reference to the AN5200 and the MPC5674K example code.

also, i am trying to implement an 1bit error injection code, but an 1bit error reporting interrupt does not occur.

My program sequence is as follows.

1. write the original data A(0x0000000000000001) to a flash memory location (Flash_B: 0x00EFC008 ~ C).

2. Over program data A to data B(0x0000000000000002) to the same flash memory location.

Can not inject 1bit errors in this way? or Is the combination of input data A / B wrong?

Re: Flash Error Injection methods on MPC5674F

davidtosenovjan — Tue, 26 Sep 2017 11:04:56 GMT

Single bit ECC error reporting must be also enabled in UT0[SCBE]. Following sequence must be used for that:

/* 1. Enable UTest mode */
CFLASH.UT0.R = 0xF9F99999;
/* 2. Enable single bit error correction */
CFLASH.UT0.B.SBCE = 1;
/* 3. Finish the UTest mode by writing UT0[UTE] with 0. */
CFLASH.UT0.B.UTE = 0;

Chosen pattern for single bit injection may be as follows:

1. Write the original data A = 0xFFFFFFFF00000000 (syndrome X) to a flash memory location.

2. Over program data A to data B = 0xFFFFFFFF00000001 (syndrome Y) to the same flash memory location.

Re: Flash Error Injection methods on MPC5674F

youngseolee — Tue, 26 Sep 2017 11:21:39 GMT

Thank you for your help.

I solved this problem with your help.