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TPL5010: TPL5010

Jussi Hakulinen
Prodigy 20 points
Part Number: TPL5010

Tool/software:

Hi. I'm Jussi Hakulinen from Finland.

My aim is to use TPL5010 as watchdog for Linux system,

Is it possible to use two separate timebases? For example first 60sec timeout for program loading and then normal operation 2sec timeout.

When program starts to run (within 60sec) then connect a shunt resistor for 2 sec timebase.

My question is: Does it work properly?

App schematics attached.

BR. JussiTPL5010.pdfTPL5010.pdf

  • 0
    TI__Guru* 99310 points

    Hi Jussi,

    Time interval change cannot be done "on the fly". Time interval is determined during POR period. 

    If you want to change the time interval after program loading, you can change the resistor value using the WDS control then do a power cycle to the TPL device. 

  • 0 in reply to Noel Fung
    Prodigy 20 points

    TPL5010-1.pdf

    Hi.
    Many thks.
    Is the following case possible? To use two pcs of TPL5010. Very economical and flexible component.
    Remarks (schematic attached):
    1) For watchdog timer use - can the WAKE signal be unconnected? No need in WDT use. The TPL5010 datasheet says "The DONE signal resets the counter of the watchdog only"
    2) After POR Q3 is in OFF state - only U9 is "active" during Linux loading -100sec timeout.
    3) When the app program starts, one DONE (WDI) pulse to confirm to reset counter of both TLP's.
    4) Then WDI to logic "1" - Q4 to ON state - U15 is "active" - 2sec timeout.
    5) WDI pulse every second as normal WDT to both TPL's.

    OK?

    BR Jussi

  • 0 in reply to Jussi Hakulinen
    Prodigy 20 points

    NOTE !!!   4) Then WDI to logic "1" - Q4 to ON state - U15 is "active" - 2sec timeout. - - - - -  WDI is wrong - must be WDS

  • 0 in reply to Jussi Hakulinen
    TI__Guru* 99310 points

    Hi Jussi,

    I will close this post and reply on the other post.