bq 500212A sleep.

Q1.) When does the bq500212A enter sleep mode?

A1.) Sleep is a long off time of 5 sec and is used during charge complete condition, receiver has sent EPT01.

Q2.) Can I simulate it in real life somehow?

A2.) Yes, the bq51013B EVM can be configured to send EPT01, set EN1 and EN2 high.

Q3.) We are using controller instead of the analog RC timers (for sleep and snooze) from what we understood when waking up from snooze we should put the snooze_cap to 1 and fall to 0 after we see the peek from snooze?

A3.) The Snooze_CHG (Pin 22) and Snooze_CAP (Pin 3) are used to tell the bq500212A if it has woke up from a Snooze (500mS) or Sleep (5 sec).  Before going into Snooze shutdown a pulse is sent from Snooze_CHG to charge the circuit.  Circuit will discharge during off time.  When the bq500212A wakes up it will read Snooze_CAP voltage, greater than 1.2V indicates snooze mode and less than 1.2V indicates Sleep.  If external logic control is used Pin 3 can be pull up to 3.3V.

Bill Hi

thanks again for your detailed answer.

regarding A3.

my question is more about timing although the 3.3v is also helpfull info.

we are rising pin 3 (snooze_cap) in the same moment that we activate the bq - after the the snooze period (when the ldo en leg in the evl for example rises)  we rais it to 3.3v untill the snooze pin pulse and then we put it to 0v again this worked for us well. (is it how it should be?)

does the same sequence happen in sleep just that pin 3 is not rising and stay on 0V all the time?

thanks in advanced

For the Snooze_Cap pin timing it should be high when the bq wakes up from a Snooze.  You will control the LDO Enable line also, both can go high at the same time.  The bq will boot up and check the pin one time, this should be complete after about 20mS.  Beyond this time it is a do not care conditions. 

Same will apply to Sleep where the pin is held low.

thank you very much for your answer.