Rainbow Electronics GE863-PY - Manual (Page 62)

GE863 Hardware User Guide
1vv0300783 Rev.0 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 62 of 80
9 RTC and Ausiliary supply
9.1 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.
9.2 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 – GE863-GPS
Min Typical Max
Output voltage 2.75V 2.85V 2.95V
Output current 50mA
Output bypass capacitor
(inside the module) 2.2μF
Operating Range – VAUX1 power supply – GE863-QUAD/PY/SIM
Min Typical Max
Output voltage 2.75V 2.85V 2.95V
Output current 100mA
Output bypass capacitor
(inside the module) 2.2μF