Startup time from SystemOFF

[Navid_h]

Hi Nordic!

 

I faced a problem when I want wake the MCU up from SystemOFF.

 

When my nRF51822 is in SystemOFF mode, a watchdog chip wakes up the MCU. After sending the response to the watchdog chip, the MCU goes back to SystemOFF. In this process, there is ~300ms delay between waking up and starting the main() function and during this period.

 

I tried the example in here. I could see ~300ms delay between pushbutton interrupt event and LED voltage in the oscilloscope.

 

Is this a normal startup time from SystemOFF?

 

Thanks,

Navid.

[Turbo J]

The boot process with NRF bootloader is usually MBR->bootloader (calc  CRC of application and check) -> application.

Your 300ms sound about right.

[Navid_h]

Thanks