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12 www.xilinx.com Virtex-4 LX/SX Prototype Platform
UG078 (v1.2) May 24, 2006
Detailed Description
R
3. Configuration Ports
These headers can be used to connect a Parallel Cable III or Parallel Cable IV cable to the
board (see Table 2) and support all Virtex-4 device configuration modes. See Table 3 for
connecting the cables to the configuration ports and Figure 3 for setting up the JTAG chain
on the board.
Table 2: Serial Mode
Configuration Port Header Parallel Cable III/IV Pins
VCC3 VCC
GND GND
CCLK CCLK
DONE D/P
DIN DIN
PROG PROG
INIT
Table 3: JTAG Mode
Configuration Port Header
Parallel Cable IV Connector
Parallel Cable III Pins Parallel Cable IV Pins
VCC3V3 VCC VCC
GND GND GND
TMS TMS TMS
TDI TDI TDI
TDO TDO TDO
TCK TCK TCK
INIT
INIT
Figure 3: JTAG Chain Termination
UG078_03_082404
PROM
TDO
TDO
TDI
UP
DN
DUT
TDI
TMS
TDI
TCK
TDO
TCK
TMS
TDO