CYUSB3KIT-001 EZ-USB FX3 Development Kit Guide, Doc. #: 001-70237 Rev. *C
54
Kit Operation
3.9
ADMUX Boot
The FX3 device can boot from the synchronous and asynchronous ADMux interface if the
PMODE[2:0] pins are set to Z00 and Z01, respectively. For more details, see application note
AN76405 - EZ-USB FX3 Boot Options
.
3.10
USB 3.0 Enumeration
The FX3 DVK board bootloader operates as a USB 2.0 device. To enumerate as USB 3.0 device, a
firmware image that implements a USB Superspeed device is downloaded to the FX3 board. The PC
host requires a USB 3.0 host controller to run this code at Superspeed rate. The firmware examples
illustrate how to write dual-speed applications, enabling the device automatically to operate at the
maximum speed for USB 2.0 or USB 3.0 PC connection. You can confirm Superspeed operation of a
downloaded application using the USB Control Center. After firmware download, the USB Control
Center shows the list of descriptors (
Figure 3-24
) for a USB 3.0 device.
Figure 3-24. FX3 USB 3.0 Device Descriptor Example in Control Center
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