Xilinx UG078 Configuration Ports, Serial Mode, Configuration Port Header, Parallel Cable III Pins

Detailed Description

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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 III Pins	Parallel Cable IV Pins
Parallel Cable IV Connector
VCC3V3	VCC	VCC
GND	GND	GND
TMS	TMS	TMS
TDI	TDI	TDI
TDO	TDO	TDO
TCK	TCK	TCK
INIT		INIT

UP

DN

TDI

TDI

TMS

TCK

TDO

TCK TMS TDO

PROM

TDO

TDI

DUT

TDO

UG078_03_082404

Figure 3: JTAG Chain Termination

12	www.xilinx.com	Virtex-4 LX/SX Prototype Platform
		UG078 (v1.2) May 24, 2006