Telit Wireless Solutions LM940 Design Guide

LM940 Hardware Design Guide
1VV0301352 Rev. 18 Page 44 of 75 2022-01-04
Not Subject to NDA
Figure 14: ESD Protection for USB2.0
Figure 15: ESD Protection for USB3.0
6.6.2. SIM Interface
The LM940 supports two external SIM interfaces (1.8V or 2.85V).
Note: LM940 HW versions 1.0 and 2.0 have a different SIM2 pinout.
Below table lists the SIM interface signals.
Pin
Signal
I/O
Function
Type
Comment
SIM Card Interface 1
8
SIMVCC1
O
Supply output for an external UIM1 card
1.8V / 2.85V
Power
10
SIMIO1
I/O
Data connection with an external UIM1
card
1.8V / 2.85V
12
SIMCLK1
O
Clock output to an external UIM1 card
1.8V / 2.85V
14
SIMRST1
O
Reset output to an external UIM1 card
1.8V / 2.85V
SIM Card Interface 2 – LM940 1.0
13
SIMVCC2
O
Supply output for an external UIM2 card
1.8 / 2.85V
Power

Telit Wireless Solutions LM940 Specifications

General

Brand	Telit Wireless Solutions
Model	LM940
Category	Wireless modules
Language	English