User's Manual

UE910 V2 Hardware User Guide

1VV0301065 Rev.1 – 2013-12-12

10.5. RTC Bypass Output

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.

In order to keep the RTC active when VBATT is not supplied it is possible to back up the RTC

section connecting a backup circuit to the related VRTC signal (pad C14 on module’s Pinout).

For additional details on the Backup solutions please refer to the related application note (xE910

RTC Backup Application Note)

10.6. 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

200mA

Output bypass capacitor

(Inside the module)

2.2μF