Implement Sleep Mode - Githubissues

khoitd1997 / hypnos

Module embedded inside user's laptop to "remind" them to take break and sleep

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Implement Sleep Mode #18

Closed khoitd1997 closed 4 years ago

khoitd1997 commented 4 years ago

Deep sleep, no RAM retention
Wake up on GPIO change and initialize everything correctly
Also have status variables for if we are in a break

khoitd1997 commented 4 years ago

1.5 uA with System On and RTC(Can't have system Off and RTC On) vs 0.4 uA with everything Off.

So external RTC needs to consume less than 1.1 uA(1100 nA).

khoitd1997 commented 4 years ago

Sleep at around 60 nA with worst case at 300 nA and has eval board and a decent amount of supply

khoitd1997 commented 4 years ago

Use RTC as clock source for the nrf52. Note that this ONLY for the 32kHz clock, we still need an external crystal for the 32MHz one. Don't think we need the load capacitors when using this since they mentioned the 32kHz comes straight from the OSCILLATOR.

Guide for using digital clock source instead of crystal

khoitd1997 commented 4 years ago

Oscillator Guide