Sierra Wireless MC5725 Hardware Integration Manual page 81

Note: To power-off the module,
drive W_Disable# low for the
required minimum period. See
State change: Power off / on
page 23 for details.
Rev 1.9.1 Feb.09
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
2. Ensure that the module is turned off before beginning
your tests (set
If using Linux, determine if any USB devices are currently
3.
on
connected to the computer:
Open a shell window and enter the command
a.
tty/USB*
b. Record the ttyUSBn values that are returned; these are
the currently connected USB devices. If the command
returns "no such file or directory", there are no devices
currently connected.
W_Disable#
4. Test
W_Disable#
device, this may just require powering up the device. Refer
to the PCI Express Mini Card Dev Kit Quick Start Guide
(Document 2130705) for more details.
5. Test USB functionality—Check for USB enumeration.
(Windows systems) The Device Manager shows Sierra
·
Wireless items under the Ports ‐ (COM & LPT) entry. The
devices shown depend on the module type. For
example:
MC87xx
·
MC57xx
·
(Linux systems) Enter the command
·
then record and compare the results with those from
Step 3. If there are any new ttyUSBn devices, then the
modem has enumerated successfully. (There should be
three or seven new devices, depending on the module
type.) For example:
Proprietary and Confidential
W_Disable#
low).
.
—Turn on the module by letting
float (high impedance). Depending on your
Testing
ls /dev/
ls /dev/tty/USB*
and
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