how much time nRF51822 takes to comeout of reset.

[Anand Ramashetty]

Hi ,

Could anybody share me the details on the time taken by the nRF51822 to comeout from reset state for the below reset input.

1. Wakeup from OFF mode reset
2. Pin reset
3. Soft reset

Regards, Anand

[Hung Bui]

Hi Anand,

You can find the start up time from systemOFF and start up time from power-on at Section 8.2 Power management in the nRF51822 Product Spec.

I did a quick test here with pin reset when in systemON, and it takes about 0.2us faster than from systemOFF. The softreset also take about 2us faster. Please be noted that the startup time in the product spec doesn't mean it the time you get to main() because there is some start-up instruction before the PC get to main() for example the code in arm_startup_nrf51.s, system_nrf51.2

I'm expriencing here it's taking about 241~243us to get to main().

[Hung Bui]

@Anand: Sorry that you have the case unanswered. I have my co-worker Håkon working on that case, please follow up :)