Telit Wireless Solutions UE910 series User Manual

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11.2 MODEM SERIAL PORT 2 (USIF1)
The secondary serial port on the UE910 is a CMOS1.8V with only the RX and TX
signals.
The signals of the UE910 serial port are:
PAD
Signal
I/O
Function
Type
COMMENT
D15
TX_AUX
O
Auxiliary UART (TX Data to
DTE)
CMOS 1.8V
SHARED WITH
SPI_MTSR
E15
RX_AUX
I
Auxiliary UART (RX Data from
DTE)
CMOS 1.8V
SHARED WITH
SPI_MRST
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 UE910 when the module is powered off or during
an ON/OFF transition.
NOTE:
Due to the shared pins, when the Modem Serial port is used, it is not possible to use the SPI
functions.
DRAFT

Telit Wireless Solutions UE910 series Specifications

General

Brand	Telit Wireless Solutions
Model	UE910 series
Category	Control Unit
Language	English