how to put the device in sleep and wake up by using timer

[ps_anu]

i am using nRF523832 , how to put the device in sleep mode and wake up by using timer ...or else by threshold 

suggest an idea 

thanks in advance

[Stian Røed Hafskjold]

Please check out this example: http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/nrf_dev_simple_timer_example.html?cp=4_0_0_4_5_47