User's Manual

CL865-DUAL Hardware User Guide
1vv0301104 Rev.1 – 2014-03-07
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 18 of 70
Mod. 0805 2011-07 Rev.2
5. Hardware Commands
5.1. Auto-Turning ON the CL865
To Auto-turn on the CL865, the power supply must be applied on the power pins VBATT and
VBATT_PA, 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