User's Manual

GE866-DUAL Hardware User Guide
1VV0301051 Rev. 2 – 2014-04-07 7
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Reserved. Page 55 of 82
Mod. 0805 2011-07 Rev.2
In the design is necessary to add a resistor 47K pull up to
2.8V, this pull up must be switched off when the module is in
off condition.
11.5. Using the RFTXMON Output GPIO5
The GPIO5 pin, when configured as RFTXMON Output, is
controlled by the GE866-QUAD module and will rise when the
transmitter is active and fall after the transmitter activity
is completed.
There are 2 different modes for this function:
1) Active during the Call:
For example, if a call is started, the line will be HIGH
during all the conversation and it will be again LOW after
hanged up.
The line rises up 300ms before first TX burst and will became
again LOW from 500ms to 1s after last TX burst.
2) Active during the TX activity
The GPIO is following the TX bursts
Please refer to the AT User interface manual for additional
information on how to enable this function.
11.6. Using the ALARM/BUZZER output GPIO6
The GPIO6 has 2 alternate functions:
• ALARM
• BUZZER
The GPIO6 pad, when configured as Alarm Output, is controlled
by the GE866-QUAD module and will rise when the alarm starts
and fall after the issue of a dedicated AT command.
This output can be used to controlling microcontroller or
application at the alarm time.