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TPS3823
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  • Forum Post: Re: Enabling / Disabling Watchdog function in TPS3823-33

    Michael Day
    Per the TPS3823-33 datasheet, "Leaving WDI unconnected disables the watchdog". You can use your uP with open, or tri-stated GPIO to disable the watchdog. To enable watchdog ( WDI ), simply configure the GPIO to drive a logic high and low to the WDI pin.
    on May 17, 2010

  • Forum Post: Re: TPS3820 -50 Watchdog Control

    Michael Day
    The datasheet's timing diagram provides some of the data you need. It shows that you must toggle the WDI input continuously to keep the /RESET signal from going active. If the WDI signal is not toggled within tt(out), /RESET goes low. The tt(out) values for the different ICs are specified in the...
    on Jul 28, 2011

  • Forum Post: Re: TPS3820 -50 Watchdog Control

    Michael Day
    As long as you toggle the WDI low to high or high to low within the Ttout time specified in the datasheet, the TPS3820 will operate properly without generating an active low /RESET signal. If you wait longer than Ttout, the /RESET output will go low.
    on Aug 1, 2011

  • Wiki Page: TPS3823-33 - Enabling / Disabling Watchdog function

    Chris Glaser
    Q: Enabling / Disabling Watchdog function in TPS3823-33 by 1136393 Hi, Would like to know how we can enable/disable watchdog function in TPS3823-33 device. Customer would like to enable watchdog function through MCU GPIO and then when not required, he needs to disable the watchdog function. By making...
    on Sep 12, 2011

  • Wiki Page: TPS3823-33 - disable watchdog

    Chris Glaser
    Q: Question about TPS3823-33 by 1181227 Hi team, My customer, plans to use TPS3823-33 for next generation air conditioner. They don't need watch dog fuction. can they leave WDI pin as non-connection? A: Re: Question about TPS3823-33 by 10449 Searching on "disable" in the...
    on Sep 12, 2011

  • Forum Post: Re: Wdi decoupling in TPS3823-33

    Michael Day
    I assume you are asking about the wording in the Description paragraph on page two of the datasheet. This means that you can NOT apply a changing WDI signal to the TPS3820 if the IC is in reset. You must disconnect the WDI signal to the IC when /RESET is low. If you apply a changing WDI signal when ...
    on Nov 15, 2011

  • Forum Post: RE: Looking for a watchdog timer

    Darwin Fernandez
    Hi Calum, Have you looked into the TPS3823? This device can be disabled by open-circuiting the WDI pin, it can be stobed 20ms to avoid reset (Ttimeout=0.9s), minimum temperature -40 degC, and has MR pin. Below is the product page. http://www.ti.com/product/tps3823-25 Regards, Darwin
    on Nov 5, 2012

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