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AM2434: AM2434 Systematic capability up to SIL 3?

Shaoxing Ke
Expert 3590 points
Part Number: AM2434
Other Parts Discussed in Thread: AM2634

Hi Experts,

I am asking for my customer urgently.

Customers are developing functional safety products for I/O modules, they are interested in AM243x. Here are some question:

Q1.AM2434 R5F can work Lockstep mode? If yes, AM243x R5F enables Lockstep mode with functional safety MCU/M4F, so that the chip hardware reaches to Hardware integrity up to SIL 2 targeted, and then two AM243x can reaches to Systematic capability up to SIL 3. If not, Hardware integrity up to SIL 2 targeted only point to functional safety MCU/M4F, and R5Fbelongs to the non-functional domain. So, functionally safe code can only run on M4F. Am I right?

Q2.If AM2434 R5F can work Lockstep mode, per clusters two R5F Operation instruction Mutual Diagnosis? Thanks a lot!

  • 0
    TI__Guru**** 198766 points

    Hi Shaoxing,

    AM2434 doesn't support lockstep. It still supports SIL-2 with an additional M4 core as a safety monitoring MCU. AM2634 supports lockstep cores and up to SIL-3 functional safety compliance. It also has more real time control capabilities and analog peripherals. 

    The Cortex-R5F cache and SRAM are protected by SECDED ECC, and Cortex-M4F SRAM is also protected by SECDED ECC. Both cores (R5 and M4) can perform the functional safety mechanisms for example memory BIST, CPU core BIST, ECC diagnostic etc.

  • 0 in reply to QJ Wang
    TI__Expert 3590 points

    Hi Wang,

    If I understand correctly, FSoE code can run on R5F, right? Just use the safety monitoring MCU to compare the functional data.

  • 0 in reply to Shaoxing Ke
    TI__Guru**** 198766 points

    Yes, the safety diagnostics can be executed on R5F, for example CPU LBIST and SRAM PBIST, memory ECC selftest. The MCU can initiate the diagnostics, and monitor the test status.