• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 98 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.

TPS3820-Q1: TPS3820-Q1 problem

Luis Carvajal
Prodigy 10 points
Part Number: TPS3820-Q1
Other Parts Discussed in Thread: TPS3820

Tool/software:

Dear experts,

I'm trying to work with the watchdog TPS3820-Q1 and a NXP microcontroller. The circuit is shown in the figure below: 

The signal WDI_UC is a GPIO from the microcontroller and RSTN_UC is the microcontroller reset.

The problem is, the reset signal is permanently at low level. I guess, the watchdog is putting at low level the reset signal due tht WDI signal is not sending from the microcontroller because it is not programming yet. So, I cannot programming the microcontroller because the reset signal is at low level. Is there any way to program the microcontroller without disconnect WDI pin from the microcontroller.

Thanks in advance

  • 0
    TI__Genius 9660 points

    Hi Luis, 

    Thanks for your question. 

    You can disable the watchdog. If the WDI pin detects that it is in a high-impedance state the TPS3820/3/4/8-xx-Q1 will generate its own WDI pulse to ensure that RESET does not assert. 

    Hope this helps,

    Best Regards,

    Sila Atalar