How to increase watchdog time greater than 3 seconds in PSOC5

[sako_4733926]

Dear All,

I have a design with CY8C5268AXI-LP047 microcontroller.

I have an requirement of watchdog timer with reset time of 5 to 10 seconds.

The CY8C5268AXI-LP047 part has watchdog timer with time limit of 2 to 3 seconds only.

Anyone can help me to increase watchdog time up to 10 seconds?

[VenkataD_41 · Accepted solution]

Hi,

The reset time period of watch dog timer in PSoC 5 family devices cannot be set more than 3 seconds. This is a limitation with device architecture.

Thanks

Ganesh

[sako_4733926]

Thanks a lot.

[Len_CONSULTRON]

sako,

Many applications that need very long WDT times will use the shorter WDT time limit and occasionally "pet" the watchdog one or more times during the long operation.

This may not be desirable.  An alternate solution is to find an external watchdog that can support your long time.   There are a chip type called a SBC (System Basis Chip) that include many system subfunctions like a Voltage Regulator some higher voltage IO control and an external watchdog.

Len

[sako_4733926]

Thanks a lot.

The external watchdog timer will be my last option.

Otherwise I will try to manage with shorter watchdog time.