Xilinx ZC702 User Manual page 21

The ZC702 board uses a Standard Microsystems Corporation USB3320 USB 2.0 ULPI
Transceiver at U9 to support a USB connection to the host computer. A USB cable is
supplied in the ZC702 Evaluation Kit (Standard-A connector to host computer, Mini-B
connector to ZC702 board connector J1). 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. Consult the Standard Microsystems
Corporation (SMSC) USB3320 data sheet for clocking mode details
The interface to the USB3320 transceiver is implemented through the IP in the XC7Z020 AP
SoC Processor System.
Table 1-6 describes the jumper settings for the USB 2.0 circuit.
Table 1-6: USB Jumper Settings
Header Function
J44 USB PHY reset
J7 Host/OTG or device
J33 RVBUS select
J35 CVBUS select
J34 Cable ID select
J36 USB Micro-B
The connections between the USB Mini-B connector at J1 and the PHY at U9 are listed in
Table 1-7.
Table 1-7: USB Connector Pin Assignments and Signal Definitions Between J1 and U9
USB Connector
J1
Pin Name
1 VBUS USB_VBUS_SEL
2 D_N USB_D_N
3 D_P USB_D_P
5 GND GND
ZC702 Board User Guide
UG850 (v1.2) April 4, 2013
Shunt ON = USB PHY reset
Shunt OFF = USB PHY normal operation
Shunt ON = Host or OTG mode
Shunt OFF = Device mode
Position 1–2 = Device mode (10 kΩ)
Position 2–3 = Host or OTG mode (1 kΩ )
Position 1-2 = OTG and Device mode (1 µ F)
Position 2-3 = Host mode (120 µ F)
Position 1-2 = A/B cable detect
Position 2-3 = ID not used
Position 1-2 = Shield connected to GND
Position 2-3 = Shield floating
Net Name
+5V from host system
Bidirectional differential serial data (N-side)
Bidirectional differential serial data (P-side)
Signal ground
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[Ref
Shunt Position
Description
Feature Descriptions
2].
USB3320 (U9)
Pin
22
19
18
33
21