nRF51422 startup time for 32kHz

[takin]

Hello I have a question for startup time for 32kHz of nRF51422. nRF51422_PS v3.1 indicates startup time for 32kHz typ 0.3sec.

What is this spec minimum value. I’d like to know approximately value of this spec.

[takin]

Hi Håkon

Thank you for your answer. If I use the crystal that startup time is 80msec, is that OK for nRF51422 ?

And would you tell me what "tstart,x32k" is meant. I think that it means if startup time of the crystal what I choose below the value, it works with no problem.

regards

[Håkon Alseth]

The parameter tstart,x32k is an example-startup time for a external 32k crystal. What is important when choosing an external 32k crystal is that you are within the maximum parameters specified in chapter 8.1.5. (CL,X32k / C0,X32k / RS,X32k)