Usb 2.0 Ulpi Transceiver - Xilinx VC707 User Manual

Chapter 1: VC707 Evaluation Board Features

USB 2.0 ULPI Transceiver

[Figure
The VC707 board uses a Standard Microsystems Corporation USB3320 USB 2.0 ULPI
Transceiver (U8) to support a USB connection to the host computer. A USB cable is
supplied in the VC707 Evaluation Kit (type-A connector to host computer, mini-B
connector to VC707 board connector J2).
The USB3320 is a high-speed USB 2.0 PHY supporting the UTMI+ low pin interface (ULPI)
interface standard. The ULPI standard defines the interface between the USB controller IP
and the PHY device which drives the physical USB bus. Use of the ULPI standard reduces
the interface pin count between the USB controller IP and the PHY device.
The USB3320 is clocked by a 24 MHz crystal. The ULPI interface supports two clocking
modes selected by jumper on J14:
•
•
Consult the SMSC USB3320 data sheet for clocking mode details
The FPGA interface to the USB3320 transceiver is implemented through the AXI universal
serial bus 2.0 device IP. See LogiCORE IP AXI Universal Serial Bus 2.0 Device Product Guide
for Vivado Design Suite (PG137)
Note:
on headers J13 and J45 must be configured to their default state as described here:
•
•
Figure 1-5
jumper on header J44 pins 1–2 (default). The USB shield can optionally be connected
through a capacitor to GND by installing a tantalum capacitor (body size C) at location
C326 and jumping pins 2-3 on header J44.
22
Send Feedback
1-2, callout 4]
24 MHz ULPI output clock mode (default): No jumper on J14. The PHY drives the
UPLI clock. This is the default setting.
60 MHz ULPI input clock mode: Jumper across J14 pins 1–2.
The AXI universal serial bus 2.0 device IP supports USB-supplied power mode only. Jumpers
J13 = jumper removed
J45 = jumper across pins 1–2
shows the shield for the USB mini-B connector (J2) can be tied to GND by a
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[Ref 5]
[Ref 17].
VC707 Evaluation Board
UG885 (v1.4) May 12, 2014