AM2431: AM243x single-core: 1-bit ECC writeback to DRAM and repeated ECC events

Part Number: AM2431

Hi TI team,
We are using AM243x with inline DDR ECC and would like to confirm best practice for 1-bit errors. 
We are currently using with only one core enabled, and we have set the 1-bit ECC interrupt priority to 0. 
I reviewed your previous response
PROCESSOR-SDK-AM62X: DDR ECC Single Bit Error Correction Guideance - Processors forum - Processors - TI E2E support forums 

and would like to confirm the following: 
1.In this AM243x single-core setup, do you still recommend not writing corrected 1-bit data back to physical DRAM?

2.If we do not write corrected data back to DDR, a 1-bit ECC error will occur every time this address is read.
For this repeated error behavior, do you have any recommendations?

  • i think same advice would apply.  Even though you only have single core setup, there are other initiators in the device (other peripherals, DMAs, etc) which can access DDR so trying to write back the correction may be risky as outlined in the other thread.  I think the repeated behavior on the same address should not an issue.  But your software should keep track of increasing ECC errors across multiple locations, which could indicate a failing device.

    Regards,

    James