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 52 of 70
Mod. 0805 2011-07 Rev.2
11.6. RTC Bypass Output
The CL865 module is provided by an internal RTC section.
The RTC function of CL865 cannot be operated with VRTC only because the RTC section is
not an independent part in CL865 unlike other Telit’s products. So the external RTC backup
capacitor will be also useless and VBATT must be connected to the CL865 to use the RTC
feature.
VRTC is the supply for the internal RTC section and it is generated from VBATT inside the
CL865 so the customer must not connect any power supply to the VRTC pin of the CL865.
And the customers must not use VRTC for the power supply to any circuits or device in their
application board.
NOTE:
NO devices must be powered from this pin.
WARNING:
For CL865 the RTC feature cannot be operated with VRTC only so VBATT must be
connected to the CL865 to use the RTC function.
11.7. VAUX/PWRMON Power Output
A regulated power supply output is provided in order to supply small devices from the
module. This output is active when the module is ON and goes OFF when the module is shut
down. The operating range characteristics of the supply are:
Operating Range – VAUX/PWRMON power supply
Parameter
Min
Typical
Max
Output voltage
1.77V
1.8V
1.83V
Output current
100mA
Output bypass capacitor
(Inside the module)
2.2μF