User's Manual

GE910 Hardware User Guide
GE910 Hardware User GuideGE910 Hardware User Guide
GE910 Hardware User Guide
1vv0300962 Rev.9-bis3 2013-05-20
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 68 of 87
Mod. 0805 2011-07 Rev.2
12.4. 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.
WARNING:
Never connect VRTC pin to VBATT.
12.5. External SIM Holder Implementation
NOTE:
Please refer to the related User Guide (SIM Holder Design Guides, 80000NT10001a).
12.6. ADC Converter
12.6.1. Description
The on board ADC has 10-bit resolution.
It is able to read a voltage level in the range of 0÷1.3 volts, to store and to convert into a 10 bits
word.
Min Max Units
Input Voltage range 0 1.3 Volt
AD conversion - 10 bits
Resolution - < 1.3 mV
The ADC input line is named as ADC_IN1 and it is available on PAD B1.
12.6.2. Using ADC Converter
AT command to manage the ADC is:
AT#ADC=1,2
The read value is expressed in mV
NOTE:
Refer to SW User Guide or AT Commands Reference Guide for the full description of this
function.