Hi,
some details about the Full Sleep Mode in the bq34z100-G1 datasheet are not clear to me:
"FULL SLEEP mode is entered automatically when the device is in SLEEP mode and the timer counts down to 0
(Full Sleep Wait Time > 0). FULL SLEEP mode is disabled when Full Sleep Wait Time is set to 0."
1. In 8.3.1.2.12 SET_FULLSLEEP: 0x0010 it says "This allows the gauge to enter the FULL SLEEP power mode ...". So i have to send this command to set the FULLSLEEP flag first, otherwise it doesn't enter automatically the Full Sleep mode. Is this correct?
2. "Full Sleep Wait Time" must be greater than 0 to allow the gas gauge to enter Full Sleep mode. I guess that "FS Wait" (Subclass ID 68, Offset 11) is meant, is this correct?
3. There are two different specifications regarding the time until the gas gauge is ready after Full Sleep for serial communication:
"While in FULL SLEEP mode, the fuel gauge can suspend serial communications as much as 4 ms by holding the communication line(s) low."
"For I2C communications, the first I2C message will incur a 6-ms–8-ms clock stretch while the oscillator is started and stabilized."
Which one is correct or what is the absolutely longest time the gas gauge needs for answering an I2C request after Full Sleep (ACK the address)?
Best Regards
Sebastian