User Guide

LM960 HW Design Guide
1VV0301485 Rev. 3 Page 40 of 74 2018-12-14
6.5.1. USB Interface
The LM960 module includes super-speed USB3.0 with high-speed USB2.0 backward
compatibility. It is compliant with Universal Serial Bus Specification, Revision 3.0 and can
be used for control and data transfers as well as for diagnostic monitoring and firmware
update.
The USB port is typically the main interface between the LM960 module and OEM
hardware.
USB 3.0 needs series capacitors on the TX lines in both directions for AC coupling. In
order to interface USB3.0 with an application board of customer, 0.1uF capacitors should
be installed on USB_SS_RX_P/M lines of the LM960. There are already series capacitors
on USB_SS_TX_P/M lines inside LM960 module.
The USB interface suggested connection is the following:
Connection for USB Interface
Information – The USB signal traces must be routed carefully.
Minimize trace lengths, number of vias, and capacitive loading. The
impedance value should be as close as possible to 90 Ohms
differential.
I2C I2C (optional)
Audio I/F PCM (optional)
Antenna ports 4 for Cellular, 1 for GNSS