CYUSB3KIT-001 EZ-USB FX3 Development Kit Guide, Doc. #: 001-70237 Rev. *C
82
A.3
USB 2.0 Enumeration
A.4
USB Driver Installation
Problem
Possible Cause
Possible Solution
FX3 DVK board does not
enumerate when connected
to PC host
Sequence of operations
If the board is powered first and then
connected to the PC, it may not enumerate.
User should hit the reset button in this case.
Incorrect power mode
jumper settings
If the DVK board is self-powered, ensure that
the jumper settings are as shown in
“Self-
Power Mode” on page 36
Incorrect setting of jumper
J53
Verify that pins 1–3 or 2–4 of J53 are shorted to
enable bus-power mode
USB 3.0 cable failure
Verify that the USB cable is properly
connected. Use the cable supplied with the kit
or a USB-IF certified cable
Windows OS fails to indicate
enumeration to user
The FX3 device enumerates correctly but
sometimes Windows OS does not display a
window to indicate that the device has
enumerated. See
Figure 3-4
and
Figure 3-5
and locate the FX3 device entry in the
Windows OS Device Manager
Problem
Possible Cause
Possible Solution
Cannot Install cyusb3.sys
driver
Unsigned cyusb3.sys driver
FX3 SDK earlier than version 1.1.1 contains
unsigned USB drivers. To use these drivers,
reboot the PC host and during boot press
[F8]
and select
Disable Driver Signature
enforcement
in the list of PC BIOS options
Use drivers from SDK version 1.1.1 and later,
which contain Microsoft certified
cyusb3.sys
driver along with a secure catalog file
(
cyusb3.cat
). The latest SuiteUSB can also be
downloaded separately from the FX3
SDK
webpage
.
Incompatible driver for OS
platform
Install the correct SuiteUSB installer.
For 32-bit Windows XP/Vista/7 install
CyUSB3_x86_<Build_no>.msi.
For 64-bit OS platform install
CyUSB3_x64__<Build_no>..msi.
Perform manual driver re-binding as described
in section 3.4.1. Using Windows Hardware
Wizard.
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