User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved. Page 78 of 97
11.10. RTC Bypass Out
The VRTC pin brings out the Real Time Clock supply, which is
separate from the rest of the digital part, allowing having
only RTC going on when all the other parts of the device are
off.
To this power output a backup capacitor can be added in order
to increase the RTC autonomy during power off of the battery.
NO Devices must be powered from this pin.
11.11. External SIM Holder Implementation
Please refer to the related User Guide (SIM Holder Design
Guides, 80000NT10001a).
11.12. VAUX Power Output (only for GE864-GPS)
A regulated power supply output is provided in order to supply
small devices from the module.
This output is always active when the module is powered by
VBATT.
The operating range characteristics of the supply are:
Operating Range – VAUX1 power supply
Min
Typica
Max
Output voltage
2.74V 2.80V 2.86V
Output current
100mA
Output bypass
capacitor
(inside the module)
1µF