TC26x ECCD ECE Problem

[tripod]

Hi all,

I am trying to enable SRAM ECC based on understanding of MTU registers and iLLD_1_0_1_10_0. When after executing below code in Figure 1, the problem occurs and I cannot figure it out.

Figure 1 MTU module enable

# Problem : MC_CPU0/1_PTAG.ECCD.ECE keep Disable 

ECCD.ECE of other SRAMs have been automatically set Enable after Figure 1, (including MC_CPU1_DSPR, MC_CPU1_DTAG, MC_CPU1_PSPR,MC_CPU1_PSPR, MC_CPU0_PSPR). However, only MC_CPU0/1_PTAG.ECCD.ECE are automatically set Disable.

Also even under LAUTERBACH TRACE32, only MC_CPU0/1_PTAG.ECCD.ECE cannot be manually set between Enable and Disable, the other SRAMs mentioned can be changed easily. It seems like that MC_CPU0/1_PTAG.ECCD.ECE are always set as Disable by something. But I don't know what it is.

Hope some guy shares insight with me. Thanks a lot !

Best Regards,

tripod

[µC_Wrangler]

PTAG is part of the program cache.  Do you have program cache disabled at that point in your application?  Make sure CPUx_PCON0.PCBYP=1 (cache bypassed).

[tripod · Accepted solution]

Hi µC_Wrangler ,

The ECC type of PTAG is EDE, its ECCD.ECE should be disable.

Regards,

tripod