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TMS320F28P650DH: What is included in CPU2 (ie primary module) and shadow CPU of CPU2 (used for lockstep)?

AnBer
Mastermind 30110 points
Part Number: TMS320F28P650DH

Tool/software:

Team,

-I understand from the below thread that CPU2 is always independent from CPU1 (whether or not Lockstep on CPU2 is available on the specific variant).
The lockstep feature is specifically between CPU2 and the shadow CPU of CPU2. Correct?
https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1358988/tms320f28p659dk-q1-lockstep-function-is-optional/5185575#5185575

Now my question specifically about CPU2:
-For variant with dual CPUs (ie CPU1 and CPU2) but without Lockstep (like DK7, DK6, DH6) are FPU64/FPU32/TMU/VCRC available in CPU2?

-For variant with dual CPUs (ie CPU1 and CPU2) with Lockstep (like DK9, DK8) are FPU64/FPU32/TMU/VCRC physically present in both CPU2 and in the shadow CPU of CPU2?

Looking at F28P65x TRM https://www.ti.com/lit/pdf/spruiz1:
It could make sense in the F28P65x datasheet to describe precisely what is included in what we call the "primary module" in the F28P65x TRM https://www.ti.com/lit/pdf/spruiz1

Thanks in advance,

Anthony

  • 0
    TI__Genius 12955 points

    Hello Anber,

    AnBer said:
    The lockstep feature is specifically between CPU2 and the shadow CPU of CPU2. Correct?

    Correct

    AnBer said:
    For variant with dual CPUs (ie CPU1 and CPU2) but without Lockstep (like DK7, DK6, DH6) are FPU64/FPU32/TMU/VCRC available in CPU2?

    Yes FPU, TMU, VCRC has no dependency on lockstep or not.

    AnBer said:
    For variant with dual CPUs (ie CPU1 and CPU2) with Lockstep (like DK9, DK8) are FPU64/FPU32/TMU/VCRC physically present in both CPU2 and in the shadow CPU of CPU2?

    Yes CPU2 and CPU2 shadow are identical because they need to run in lockstep.

    AnBer said:
    It could make sense in the F28P65x datasheet to describe precisely what is included in what we call the "primary module" in the F28P65x TRM

    The primary module is in context of LCM module, for F28P65x it is CPU2 (all co-processors of CPU2), DMA and ePIE.

    The block diagram below should summarize all your doubts.

    Thanks.