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CCM to ESM Signal selection w.r.t. ERROR Forcing Mode and SelfTest Error Forcing Mode

Pashan
Intellectual 715 points
Other Parts Discussed in Thread: TMS570LS20216

Hello,

In the TRM for TMS570, it is mentioned that CCM can generate ERROR Signal to ESM module in "ERROR Forcing Mode [MKEY=1001]" and "SelfTest Error Forcing Mode[MKEY=1111]".

In the Device Data Sheet for TMS570LS20216 I find the following under section

3 Reset / Abort Sources

Error Source              System Mode         Error Response    ESM Hookup group channel

Self test failure            User/Privilege                ESM              1.31

Compare failure          User/Privilege             ESM => NMI      2.2

Now, which one of the above "RESET/ABORT Source" line is linked to MKEY=1001 and which one is for MKEY=1111?

I am assuming MKEY=1111 is only for "SELF TEST FAILURE" Line of RESET ABORT Source.

MKEY=1001 is only for "Compare Error" Line of RESET ABORT Source and in effect it is NMI.

Is the correct?

Thank you.

Regards

Pashan

 

  • 0
    TI__Intellectual 1030 points

    As you mentioned, the CCM-R4 mode is controlled by the MKEY field, bits3:0, of the CCMKEYR register (0xFFFF_F604):

    Considering self test (MKEY=0110), error forcing (MKEY=1001)and self test error forcing (MKEY=1111) modes:
    - The CCM-R4 self test error output can be asserted/active in self test and self test error forcing modes.
    - The CCM-R4 compare error output can be asserted/active in error forcing mode.

    Once suspend mode is entered, the compare errors will not be generated, irrespective of the compare mode the CCM-R4 is in.