Implementing auto Power ON circuit

[darla14]

Posted on September 17, 2015 at 13:49

HI , 

I am a new bie and wanted to know how can I implement an auto power ON ( every Night at 2200 hours for 10 years)circuit with STM32 or related components.There may be a term for this particular circuit , I am not sure.Please help me with the keywords or any necessary information.Thanks in advance !Rp #stm32 #stm32l151 #stm32-nucleo #lpm #current #low-power

[Tesla DeLorean]

Posted on September 17, 2015 at 22:34

The L1 is designed to run off a battery, you'd use the on board RTC in the L1 to pull it out of STANDBY. You'd use an external 32.768 KHz crystal to provide the clock with some accuracy, would probably wander off over 10 years if not periodically corrected/adjusted.

You'd have to evaluate the current draw to determine battery size/life.

[darla14]

Posted on September 18, 2015 at 04:01

Thanks for the quick reply.Is there any Application note to implement this or something similiar to it.?

Best Rgds,Rp

[Tesla DeLorean]

Posted on September 18, 2015 at 13:55

I guess there are the examples, 

STM32L1xx_StdPeriph_Lib_V1.3.0\Project\STM32L1xx_StdPeriph_Examples\PWR\STANDBY