BG77 leave RESET_N floating

IoT Modules LPWA Module
1

Hi,
my application uses BG77 Module stand-alone without host MCU. And I have to save space, so can I leave the RESET_N pin floating?
I read in datasheet “RESET_N is used to reset the module. Due to platform limitations, the chipset has integrated the reset function into PWRKEY, and RESET_N connects directly to PWRKEY inside the module.”
So I will only make the automatic power-on circuit like this

image
image816×335 14.1 KB

Best regards

2

You can keep the RESET_N pin open.
But according to your design VBAT control PWRKEY, then the module is equivalent to pulling down PWRKEY all the time after powering on, which is not advisable.
It is recommended to use a button to control PWRKEY.
image