STM32F4 - Watchdog in STANDBY mode

[Dams]

Hello,

After reading some applications note I did't find the way to implement a watchdog for my case.

My case:

• the MCU shall sleep during 12h
• one function on Bluetooth stack in a .a (provided by TI) takes 1024ms
• MCU is running at 48MHz

WWDG can't be used because some functions take more than 100ms.

I see that IWDOG can be stopped ?!

Somethime I have a problem with interrupt from UART and USB, MCU stay on these interrupt and my Main loop is not proceced...

How can I do to have a watchdog @ 5000ms disabled when I'm in STANDBY mode ?

Thanks for help.

[Mohamed Aymen HZAMI]

Hello,

You can disable the IWDG when in standby mode only if you use an microcontroller with the option byte "IWDG_STDBY".

IWDG_STDBY:

• If you set this option byte the independent watchdog counter is running in standby mode
• If you reset this option byte the independent watchdog counter is frozen in standby mode

Best Regards,

Mohamed Aymen.

[Dams]

Hello,

Thanks for support.

The microcontroller STM32F415 doesn't have this option bit.

Regards,

[Mohamed Aymen HZAMI]

Hello,

In order to exploit this feature, you must use a microcontroller with this option byte .

Best Regards,

Mohamed Aymen.

[MMARI.1]

hi, please suggest me about product series name of option byte with i watchdog +standby availability

from which series above mentioned option available .