User's Guide

LE910Cx HW User Guide
Doc#: 1VV0301298
Rev. 13.0 Page 103 of 124 2019-07-15
EMC Recommendations
All LE910Cx signals are provided with some EMC protection. Nevertheless, the accepted
level differs according to the specific pin. Table 43 lists the characteristics.
Table 43: EMC Recommendations
Pad
Signal
I/O
Function
Contact
Air
All Pins
All pins
All functions
± 4kV
± 8kV
Antenna
F1, K1, R9
Antenna
pads
Analog
I/O
Antenna pad
± 4kV
± 4kV
Appropriate series resistors must be considered to protect the input lines from overvoltage.
Download and Debug Port
Choose one of the following options in the design of host system to download or upgrade
the Telit software and debug the LE910Cx module when it is already mounted on a host
system.
• UART and USB interfaces
Users who use both UART and USB interfaces to communicate with the LE910Cx
module must implement a USB download method in the host system to upgrade
the LE910Cx when it is mounted.
• USB interface only
Users who use a USB interface only to communicate with the LE910Cx module
must arrange for a USB port in the host system to debug or upgrade the LE910Cx
when it is mounted.
• UART interface only
Users who use a UART interface only to communicate with the LE910Cx module
must arrange for a UART port in the host system to debug or upgrade the
LE910Cx when it is mounted.