
ZC702 Board User Guide
www.xilinx.com
21
UG850 (v1.2) April 4, 2013
Feature Descriptions
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
[Ref 2]
.
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.
The connections between the USB Mini-B connector at J1 and the PHY at U9 are listed in
Table 1-7
.
Table 1-6:
USB Jumper Settings
Header
Function
Shunt Position
J44
USB PHY reset
Shunt ON = USB PHY reset
Shunt OFF = USB PHY normal operation
J7
Host/OTG or device
Shunt ON = Host or OTG mode
Shunt OFF = Device mode
J33
RVBUS select
Position 1–2 = Device mode (10 k
Ω
)
Position 2–3 = Host or OTG mode (1 k
Ω
)
J35
CVBUS select
Position 1-2 = OTG and Device mode (1
µ
F)
Position 2-3 = Host mode (120
µ
F)
J34
Cable ID select
Position 1-2 = A/B cable detect
Position 2-3 = ID not used
J36
USB Micro-B
Position 1-2 = Shield connected to GND
Position 2-3 = Shield floating
Table 1-7:
USB Connector Pin Assignments and Signal Definitions Between J1 and U9
USB Connector
J1
Net Name
Description
USB3320 (U9)
Pin
Pin
Name
1
VBUS
USB_VBUS_SEL
+5V from host system
22
2
D_N
USB_D_N
Bidirectional differential serial data (N-side)
19
3
D_P
USB_D_P
Bidirectional differential serial data (P-side)
18
5
GND
GND
Signal ground
33