NL865B1 HW Design Guide
1VV0301450 Rev. 1
Page
33
of
72
2017-11-20
Power On
The NL865B1 will automatically power on itself when VBATT is applied to the module.
VAUX / PWRMON pin will be then set at the high logic level.
The following flow chart shows the proper turn on procedure:
PWRMON=ON
?
“Modem ON Proc”
START
PWR Supply ON
PWRMON=ON
?
Delay = 8 s
AT Init Sequence
Enter AT<CR>
N
Delay 1s – 5s
Y
Y
N
Y
Delay = 8 sec
N
Start AT CMD
AT Answer in
1sec?
Modem Reset Proc
N
Y
