xN930 M.2 Hardware User Guide
6.3
USB 2.0 HS Features
The USB 2.0 HS stack is used for communication with a PC in device role. The USB 2.0
HS component supports the following features:
•
Modem connection for AT command interface (CDC-ACM)
•
Tracing over USB (CDC-ACM)
•
Network interface for ethernet frames (CDC-NCM)
•
Suspend/Resume, Remote Wake-up and selective suspend (for power saving)
•
LPM according to “USB 2.0 Link Power Management Addendum”, Remote Wake-up
(for power saving)
•
Software download
6.4
USB Configuration
The USB feature may be configured by the UTA_USB API. The user may define different
use cases, such as support of different numbers of CDC-ACM or CDC-NCM channels.
6.4.1
Modem Connection
Up to 3 CDC-ACM logical channels are available to be used as an interface for the
following functionality:
•
AT commands
•
3GPP 27.010 Multiplexer
•
Tracing
•
Connection to test framework
The ACM channels are connected via UTA-Terminal to S-IO and from there via UTA-
Serial to the application on modem side.
6.4.2
Network Connection
Up to 4 CDC-NCM functions are available to be used as interface for network
connections servicing for up to four PDN connections.
The NCM channels are connected via the PBM driver interface to PBM and from there via
PBM service interfaces to the PTM component of C-PS.
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