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Can not clear ECSM.ESR.R1BC

Question asked by Buzdugan Andrei on Sep 20, 2016
Latest reply on Sep 20, 2016 by Buzdugan Andrei

Hello NXP Community,

 

 I am developing some code to help verify the ECC's HW for RAM. For this I need to use the error injection mechanism and inspect the ESR.R1BC. While I do see that ECC has captured correctly the address and data of the error, (though the symptom bits are way off) and the R1BC is asserted, I can not clear the R1BC.

 I have the following algorithm :

 

//Load ECSM.EEGR.ERRBIT

//Set ECSM.EEGR.FR11BI

 

//Generate SEC
array[0] = 0xFFFFFFFF - u8Idx;
readBackData= array[0];

 

//Clear ECSM.EEGR.FR11BI

 

if (ECSM.ESR.R1BC == 0x1)
{
ECSM.ESR.R1BC = 0x1;

}
else
{
/*Nothing to do.*/
}

 

 To be more specifically, I can see the R1BC clear to 0, but after half a second it is put back to 1.I can clear it, if I deactivate the ECC 1-bit RAM reporting. But, later if I re-activate it, the R1BC automically sets (restores more like it) itself. I've looked through the errata, but I didn't find anything similar. This is for SPC5605B. Did anybody else run into this scenario ? if so, is there a way-around ?

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