• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 2 answers
  • Subscribers 31 subscribers
  • Views 719 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM263P4: UL1998 Compliance Made Easier Documentation

Huey Duong
Intellectual 290 points
Part Number: AM263P4

Tool/software:

We are using the AM263P4 MCU for our application and require UL1998 certification.

Recently I found a document: spny005.pdf spny005.pdf (IEC 60730 and UL 1998 Safety Standard Compliance Made Easier with TI Hercules MCUs).  But it was for Hercules.

Is there such a document for Sitara or AM263P4 specifically?

I'm most interested in the mapping of MCU features to UL1998 requirements.  We want to know what needs to be done and ease to get certified.   Thanks.  

  • 0
    TI__Guru*** 135355 points

    Hi Huey,

    Most of our Functional Safety documentation is provided through the following; https://www.ti.com/drr/opn/AM263PX-RESTRICTED-SAFETY

    We also have the following application brief on the topic: https://www.ti.com/lit/pdf/sprt767

    If you aren't able to find the resources you need from those, I can have one of our functional safety experts comment further.

    Best Regards,

    Ralph Jacobi

  • 0 in reply to Ralph Jacobi
    Intellectual 290 points

    Thank you for the response.  I have looked through the file you sent and from the RESTRICTED-SAFETY downloads.  There are lots of good tools there.

    But it does not not provide a guide on how on how our product can meet UL1998 requirements.

    I'm looking for the exact measures that we need to implement for each UL1998 requirements section.  The attached image and document is exactly what I need, but it refers to the Hercules.   Is there an exact mapping table for AM263Px?   

    Ie.  I haven't seen LBIST capability on AM263 SDL documentation.   And unfortunately we can not run lock-step. 

    Thank you.

  • 0 in reply to Huey Duong
    TI__Expert 5416 points

    Hi Huey,

    Unfortunately, we do not have any such data to support UL1998 compliance for AM263Px.Currently we only support IEC61508 standard.

    Best Regards,
    Sahana

  • 0 in reply to Sahana H G
    Intellectual 290 points

    One of the UL1998 requirements that keep popping up is the measure against stuck-at faults using:

    "word protection with bit parity including the address".

    A7.3.2 WORD PROTECTION WITH SINGLE-BIT REDUNDANCY– Word protection with single-bit
    redundancy denotes a fault/error control technique in which a single-bit is added to each word in the
    memory area under test and saved, creating either even parity or odd parity. As each word is read, a parity
    check is conducted

    Can you tell me if the AM263P4 can meet this requirement and how?

    Specifically, how is this achieved when using XIP to external flash?

    Thanks.

  • 0 in reply to Huey Duong
    Intellectual 290 points

    I want to focus the attention on "including the address" part of the requirement.  Does Optiflash ECC incorporate the address into it's ECC?

  • 0 in reply to Huey Duong
    TI__Expert 5416 points

    Hi Heuy,

    Huey Duong said:
    Does Optiflash ECC incorporate the address into it's ECC?

    Yes, OptiFlash ECC includes the block address in its ECC calculation, please refer to section "ECCM Calculation" in the AM261 TRM (AM261x Sitara Microcontrollers Technical Reference Manual) which is also applicable for AM263P for more details. AM263Px TRM is also being updated with these details and will be live on ti.com shortly.

    Also copying a short excerpt from the TRM on the same below:

    The ECCM calculation is generated or checked on concatenated structure {1'b0,block_address[26:0],MAC_Auth_Word[127:0],Word1[127:0],Word0[127:0]} broken into four 103 bit chunks stored in the ECCM word. That is the ECCM word has four 8 bits values that each check a 103 bit segment of the concatenated structure

    Regards,

    Sahana