GL865-DUAL V3 Hardware User Guide
1vv0301018 Rev.5 – 2013-08-05
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 18 of 76
Mod. 0805 2011-07 Rev.2
5.
Hardware Commands
5.1.
Auto-Turning ON the GL865-DUAL V3
To Auto-turn on the GL865-DUAL V3, 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:
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
1second ?
N
Y
N
Delay 1s