HE910 Hardware User Guide
1VV0300925 Rev. 32 Page 89 of 111 2019-11-25
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.
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)
External SIM Holder Implementation
Please refer to the related User Guide (SIM Holder Design Guides, 80000NT10001a).
VAUX Power Output
A regulated power supply output is provided in order to supply small devices from the
module. The signal is present on Pad R11 and it is in common with the PWRMON
(module powered ON indication) function.
This output is always active when the module is powered ON.
The operating range characteristics of the supply are:
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