User's Guide

HE863 Family Hardware User Guide
1vv0300891 Rev.5
- 2011-03-18
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights
Reserved. Page 74 of 89
12.6. 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.
NOTE:
NO devices must be powered from this pin.
12.7. VAUX1 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 – VAUX1 power supply
Min Typical Max
Output voltage
1.75V 1.8V 1.85V