Specifications

Product Technical Specification & Customer Design Guidelines
44 Proprietary and Confidential - Specifications subject to change 2400058
4.7 USB 2.0 interface
The AirPrime SL808X Embedded Module features a 3-wire USB slave interface
that complies with USB 2.0 protocol signaling. Ta bl e 4-1 2 describes the purpose
and features of this interface.
3 CLK EXT_USIM_CLK
4 - -
5 GND GROUND
6 - -
7 I/O EXT_USIM_DATA
8 - -
Table 4-12: USB interface features
Feature Details
Purpose Host–module communication via AT commands, CnS objects,
etc.
Standard • USB 2.0 compliant
• CDC 1.1 - ACM compliant
Data rates supported • Optimized for high speed (480 Mbps)
• Full speed (12 Mbps)—Throughput performance is on an
“as-is” basis and must be characterized by the OEM.
Note: Throughput rates may vary significantly based on packet
size, host interface, and firmware revision.
Enumeration • Windows (using host Windows drivers)—COM ports
• Linux (with Sierra Wireless driver)—/dev/ttyUSBn devices
Power supply • VCC supply
• 3.3 V type compatible
Additional features • Firmware download over USB
Table 4-11: SIM socket pin descriptions (Continued)
Pin Signal Description