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Linux/OMAP-L138: OMAP-L138 RUN FAIL

Liven Deng
Intellectual 290 points
Part Number: OMAP-L138


Tool/software: Linux

1、What does each line of screen printing on the chip surface mean? Is the red line marked for batch information?


2.At present, our company's production line feedback has the following failure phenomena, whether it is related to chip anomalies?

1)Program can not be downloaded, JTAG can not be connected, test power supply voltage is normal, FLASH no load signal

2)The download program is successful, you can't read back version information, test with JTAG, the connection is not smooth, you can't configure DDRAM, test the power supply voltage is normal.

3)Download the program successfully, can not read back version information, test with JTAG, the program loaded into DDRAM and run away

4)The download program is successful, the version information can be read back, and the program runs normally.

  • 0
    TI__Guru**** 161600 points
    Hi,

    Please provide some more details:

    What software are you trying to run on your boards?
    How many boards have you manufactured and how many of them fail?
    For what application are these intended?

    Best Regards,
    Yordan
  • 0
    TI__Mastermind 30140 points

    Hi,

    Liven Deng said:

    1、What does each line of screen printing on the chip surface mean? Is the red line marked for batch information?


    The additional marking underlined in red relates to the lot trace code information or the environmental category on the device.

    See PACKAGING INFORMATION section at the end of the Datasheet: Note (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

    Regarding the behavior observed...

    In addition to the questions already asked, have you confirmed the clocks look good? 

    Did you confirm the design satisfy these appnote recommendations?

    Regards,
    Mark

  • 0 in reply to Mark M
    TI__Guru* 84475 points
    Hi Liven
    I did not see a response to Yordan's questions or Mark's responses.
    I am going to go ahead and mark this as resolved for now.
    I general the information you have shown in red line on the package is for lot trace etc.
    the description of failure you have provided is minimal and cannot help much in assisting you further.
    If you suspect device failures/issues and have done aba swaps to confirm that the failure is following the device and not your board, please feel free to initiate an FA request with TI for the failing devices .

    Regards
    Mukul
  • 0 in reply to Yordan Kovachev
    Intellectual 290 points
    Hi details as below:
    1：Bootloader , we tried to load bootloader into DDR memory by XDS100V2 JTAG emulator, For the fail samples, we got an error message at the step “Connect target” or “Load program”.
    2：The failure rate is 16/480=3.33%
    3：Telecom application
    4: Through 3D X-ray and replacement exclusion, it has been confirmed that there is no problem with welding and PCBA peripheral circuits.
    5: have done aba swaps to confirm that the failure on my broad
    Can you give me some suggestions on how to solve this problem?
  • 0 in reply to Liven Deng
    TI__Mastermind 30140 points
    Hi Liven,

    During the ABA swap, did the problem stay with the failing board?

    On the failing board where JTAG connection is not working, can you get the JTAG to connect with a slower JTAG TCLK frequency?

    See software-dl.ti.com/.../ccsv7_debugging_jtag_connectivity_issues.html

    Regards,
    Mark