User's Manual

MM-5100 Hardware – User Manual
Jan. 22, 2003
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Multiple service functions (eg: SMS and Data communication) of the MM-5100 Wireless Modem will
be through the TE2 and Rm interface.
“RS-232 Data” port and/or “USB” port are both for data communication however, the Modem can
communicate with only one port at a time. The Modem looks for active connection on power up and
communicates with the connection found. If both connections are active, the USB will be selected.
The USB is a Qualcomm standard that operates under MS-Windows-98SE and MS-Windows2000.
Table 3.4 USB connector Termination assignment
Pin No. Signal name Typical wiring Assignment
1 Vbus Red
2 USB- White
3 USB+ Green
4 GND Black
(Note 1) USB+ and USB- are the differential pair signals provided for the TE2.
These signals are capable of directly driving a USB cable. Internal USB_DETECT logic is used to
signal the MM-5100 Wireless Modem that a USB cable is attached.
(Note 2) ESD protection for USB signal lines to +/- 15KV
(Note 3) Internal USB_DETECT logic is used to signal the Modem that a USB cable is attached.