How and where to change startup time t1V7 , t1V2, tSTART,RC16 and tXO for system on low power mode.

[Anand Ramashetty]

In the system on low power mode , how and where to change the startup time t1V7 for 1V7 regulator and startup time t1V2 for 1V2 regulator for better power optimization. And also how to change the time tSTART,RC16,tXO for power optimization.

[Stefan Birnir Sverrisson]

Hi

The enabling and disabling of clocks and regulators is mostly autonomous and can not be controlled by the application. The general rule is that those sources are enabled when any peripheral need them. I.e. the 1.2V regulator provides power for the digital peripherals, and is only enabled when there are any peripherals enabled, otherwise it is disabled. For more information, see description of the clock models (1) (2), and the current consumption guide.

Update 20.3.2015 I think the chip is in normal mode by default and enters low power mode only when you do so explicitly in your application code. To see how to enable low power modes when not using the softdevice, look at the "Measure current consumption" section in the current consumption guide. To see how to enter low power mode when the softdevice is enabled, look at the "Low power mode with BLE softdevice" section in the current consumption guide

[Anand Ramashetty]

Hi Stefan,

Hi Stefan, Thanks for your reply and answer. One thing I need to know is , how to check what is the current system on mode is enabled in my system. Either low power mode or constant latency?(need to know in which file it is enabled).