Question for ADM693

Dear Sir/Madam,

Our customer asked the one motion as following time chart.

Q-1

Release the Hi-Z after 1590msec, and watch for T2(100msec). But WDI make change during at that time, so doesnt release the reset. Is this correct?

Q-2

There is no change for 1600msec, so release the RESET.  Is this correct?

Test circuit

Thanks Kaos

  • Hi Kaos,

    I'm not sure I completely understand your customer's question.

    Here are some example scenarios:

    1. from RESET de-assert, if WDI is floating, then WD will not cause any reset.
    2. from RESET de-assert, if WDI is floating then toggled high at any time, then WDI needs to keep toggling within every 100ms to prevent a reset.
    3. from RESET de-assert, if WDI is high or low, then it can remain its state for 1.6s without trigger a reset. but if it does toggle, say at 1s from RESET de-assert, then WDI needs to keep toggling within every 100ms to prevent a reset. 

    here is a screen shot of /RESET on CH1 and WDI on CH2 that may help better understand the behaviour.

    Ren

  • Thank you Ren,

    I can explain this to our customer after translate.

    If I got the additional question from our customer, then I will post it here again.

    Thanks Kaos