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Consumption and clock

Hi would like to evaluate the consumption of my pcb in connected mode using a nRF51. For that I use the nordic excel tool : "APM_nRF51822_S110_v3 0c.xlsx". But I really don't know how to tune the two firsts gap of the execel :

  • 16XOSC Force ON
  • Use 32.769k RCOSC

Can you help me ? I would like to simulate the case with an internal clock and the case with an internal clock.

Also, for now I use only an external clock of 32KHz build thanks to a 16Mhz external quartz, but it's consume a lot in connected mode. My idea will be to use the internal clock of 32.769k RCOSC when my device is in a idle state and switch on my external quartz when my nRF is wake up.

I know that the internal clock is not really accurate but it can be ok for just handle a timer right ? When my device is connected the slave latency is 10 and the interval 0,2 seconds. I just want a clock accurate enough to handle this and wake up my device to give a sign of life each 10 requests from the master.

Do you think its a good idea ? Is it easy to do ? Do you have some sample code ?

I hope I was clear.

Thanks a lot

Alexandre

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