Datasheet

1-Aug-2012
13
This USB port will not power the board. Therefore, Vbus needs to be connected to 3.3V though a
1KΩ series resistor. The Wake pin, pin 22, connects to GND. A 24Ω series resistor was placed
on each of the data lines, D+ and D-.
Table 6 – CY7C6 Connections
EPP Pin
UART Function in
EPP
Schematic Net
Name
CY7C6 Pin
UART Function in
CY7C64225
D11 (MIO
Bank 1/501)
TX, data out
USB_1_RXD
23
RXD, data in
C14 (MIO
Bank 1/501)
RX, data in
USB_1_TXD
4
TXD, data out
Figure 7 – USB-UART Bridge Interface
2.3.3 USB-JTAG
The ZedBoard provides JTAG functionality based on the Digilent USB High Speed JTAG Module,
SMT1 device. This USB-JTAG circuitry is fully supported and integrated into Xilinx ISE tools,
including iMPACT, ChipScope, and SDK Debugger. Designers who want to re-use this circuit on
their board can do so by acquiring these modules from Avnet.
http://www.em.avnet.com/en-us/design/drc/Pages/Digilent-JTAG-SMT1-Surface-Mount-
Programming-Module.aspx
The JTAG is available through a Micro B USB connector, J17, TE 1981568-1. TCK has a series
termination resistor, 20-30Ω, to prevent signal integrity issues.
For the JTAG Chain setup, please refer to the Configuration section.