HW User Guide
1vv0301018 Rev. 15
Page
16
of
72
2019-01-07
5. HARDWARE COMMANDS
Auto-Turning ON the GL865 V3/V3.1
To Auto-turn on the GL865 V3/V3.1, the power supply must be applied on the power pins
VBATT and VBATT_PA, after 1000 m-seconds, the V_AUX / PWRMON pin will be at the
high logic level and the module can be considered fully operating.
When the power supply voltage is between 3.22V and 3.4V, after 5000 m-seconds, the
V_AUX / PWRMON pin will be at the high logic level and the module can be considered
fully operating.
The following flow chart shows the proper turn on procedure:
NOTE:
The power supply must be applied either at the same time on pins VBATT
and VBATT_PA, or first applied on VBATT_PA and then on VBATT. The
opposite sequence shall be avoided. The reverse procedure applies for
powering down the module: first disconnect VBATT, then VBATT_PA, or
both at once.
Modem ON Proc
.
PWR supply = ON?
Y
Delay 1s - 5s for Low
Voltage Operating
Y
Modem Reset Proc
.
AT init sequence
.
N
Start AT CMD
.
N
PWMON = ON?
Y
PWMON = ON?
Delay 300mS
Enter AT<CR>
AT answer in 1 second
?
N
Y
N
Delay 1s
