Telit Wireless Solutions LM940 Design Guide

LM940 Hardware Design Guide
1VV0301352 Rev. 18 Page 49 of 75 2022-01-04
Not Subject to NDA
Pin
Signal
IO/Level
Dedicated Function
45
GPIO_05
I/O, 1.8V
Can be used as specific functions.
47
GPIO_06
I/O, 1.8V
Can be used as specific functions.
49
GPIO_07
I/O, 1.8V
Can be used as specific functions.
51
GPIO_08
I/O, 1.8V
Can be used as specific functions.
Table 32: Not Dedicated I/O
6.6.5. I2C – Inter-Integrated Circuit
The LM940 supports an I2C interface. The table below lists the LM940 I2C signals.
Pin
Signal
I/O
Function
Type
Comment
30
I2C_SCL
O
I2C Clock
CMOS 1.8V
32
I2C_SDA
I/O
I2C Data
CMOS 1.8V
Table 33: LM940 Module I2C Signal
The I2C interface is used for controlling peripherals inside the module (such as codec,
etc.).
Note: I2C is supported only on from Modem side as SW emulation of
I2C on GPIO lines.
Please contact Telit Customer support if you use it.
Note: If the I2C interface is not used, the signals can be left floating.
Using the Temperature Monitor Function
The Temperature Monitor permits to monitor the module’s internal temperature and, if
properly set (see the #TEMPSENS command in LM940 AT Commands Reference Guide),
raises a GPIO to High Logic level when the maximum temperature is reached.

Telit Wireless Solutions LM940 Specifications

General

Brand	Telit Wireless Solutions
Model	LM940
Category	Wireless modules
Language	English