User's Manual

CE910 Family Hardware User Guide
1vv0301010 Rev.11 – 2015-10-27
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 45 of 75
8.2. Modem Serial Port 2
The secondary serial port on the CE910 is a CMOS 1.8V with only RX and TX signals.
The signals of the CE910 serial port are:
PAD
Signal
I/O
Function
Type
D15
TX_AUX
O
Auxiliary UART (TX data to DTE)
CMOS 1.8V
E15
RX_AUX
I
Auxiliary UART (RX data from DTE)
CMOS 1.8V
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level
signal applied to the digital pins of the CE910 when the module is powered off or during an ON/OFF
transition.