By mistake I marked the issue as resolved - therefore this new (repeated) question:
Hi!
We are using the ship mode function of the BQ25150 to turn ON and OFF our application. We wish the change this wake-up time (twake2) to 1s instead of the default 2s, however this doesn't seem to possible?
MRCTRL Register seems to reset to default values after the BQ25150 is set into ship mode. The problem is that the turn on time is then reset back from 1 s to 2 s.
Observed using the following method:
Step 1
Board is totally unpowered, battery removed.
Step 2
Battery is added to board, board is still off
Step 3
MR input is triggered (button pressed)
Step 4
MCU reads MRCTRL Register MRCTRL Register (Address = 0x30)
The expected value is 0x2A (default value, twake2 is 2 s)
Step 5
MCU writes MRCTRL with value 0x0A (twake2 is now 1 s).
Step 6
MCU request ship mode: ICCTRL0 is written with bit 7 set to 1.
Step 7
It is observed that board is off (ship mode)
Step 8
MR input is triggered (button pressed)
Step 9
Board does not turn on until 2 s has passed (this is unexpected as the time should have been 1 s)
Step 10
MCU reads MRCTRL Register MRCTRL Register (Address = 0x30)
The read value is 0x2A, this is wrong as we have written 0x0A into the BQ25150.
Conclusion
The BQ25150 forgets its MRCTRL value after having entered ship mode.
You requested a lot of plots in order to understand our issue better.
Before we spend a lot of time on this could you please confirm that it SHOULD be possible to reduce TWAKE2 for waking up from ship mode? i.e. that all registered are kept in their state when in ship mode.
If this is actually the case, then we have an indication that the error most likely is with us and we will provide all these plots.
