Dear Igor
appreciate your anwwer. but I need your more help.
Question) whenever I read Tab7. Reset and ON/OFF Recommenation, I can’t clearly catch up with recommendation for ONOFF pin.
From the Recommendation column, We can assum that ONOFF pin can be connected to GND.
Table 7 Says on Recommendation column that For portable applications, the ONOFF pin may be connected to an ON/OFF SPST push-button switch to ground.
An external pull-up resistor is required on this pin
But From Explanation/supplemental recommendations, Table 7 says as below
A brief connection to GND in OFF mode causes the internal power management state machine to change state to ON.
In ON mode, a brief connection to GND generates an interrupt (intended to initiate a software-controllable power down).
The connection to GND for approximate 5 seconds or more causes a forced OFF.
Taking Second recommenation into cosideration , It is impossilbe to connect ONOFF pin to GND via SPST for portable application.
But when I see first recommendation, NXP recommends to be able to connect ONOFF pin to GND via SPST in Device and application operation
Only consiering first recommendationm, It should not affect board operation even when ONOFF pin is connected to GND for more than 5 seconds
Please clarify ONOFF Handling. A board has limited space. So it is hard to add additional componet like Switch /Button.
Is it recommendable to add RC time constant circuit to ONOFF pin for stable Power sequcne?
To explain simply, I want to construct a circuit that works right away as soon as the power is applied without Button/Switch for ON/OFF
thank you
Best Regards
Mark Kim
