Xilinx UG078 manual Jtag Chain, Jtag Termination Jumper

Page 13

R

Detailed Description

4. JTAG Chain

Jumper J17 provides the ability to have the Virtex-4 in the JTAG chain or remove it from the JTAG chain.

Note: The Virtex-4 device must not be in the socket when detecting the ISPROM in the chain.

5. JTAG Termination Jumper

The DUT TDO pin can be jumpered to the TDO TERM pin or the downstream TDO pin. When another board is connected to the downstream System ACE connector or downstream interface connector, jumper the DUT TDO pin to the downstream TDO pin for serial chaining. The connection allows the DUT TDO pin to be connected to the next device in the chain.

The TCK and TMS pins are parallel feedthrough connections from the upstream

System ACE interface connector to the downstream System ACE interface connector and drive the TCK and TMS pins of the onboard PROM and the DUT.

Note: The termination jumper must be in place on the last board in the chain to connect the TDO pin of the final device to the TDO feedback chain.

Virtex-4 LX/SX Prototype Platform

www.xilinx.com

13

UG078 (v1.2) May 24, 2006

Page 12 Page 14
Image 13
Page 12 Page 14
Contents UG078 v1.2 May 24 Virtex-4 LX/SX Prototype PlatformDate Version Revision Revision HistoryTable of Contents Virtex-4 LX/SX Prototype Platform Additional Resources Guide ContentsConventions TypographicalPreface About This Guide Online DocumentMeaning or Use Example CD-ROM Contents Package ContentsIntroduction Introduction FeaturesVirtex-4 LX/SX Prototype Platform Block Diagram Detailed Description Power SwitchDetailed Description Power Enable Jumpers Power Supply JacksSerial Mode Configuration PortsJtag Termination Jumper Jtag Chain6b. Downstream System ACE Interface Connector 6a. Upstream System ACE Interface ConnectorUpstream Interface Connector 44-Pin Female 6c. Upstream Interface ConnectorVCCO-Enable Supply Jumpers 6d. Downstream Interface ConnectorPrototyping Area Clock Name Pin Number Oscillator SocketsSMA Clock Pin Connections for SF363 and FF668 Differential Clock InputsClock Name SMA Clock Pin Connections for FF1148 and FF1513Pin Breakout DUT SocketBreakout FF668 User LEDs Active-HighReset Switch Active-Low Program SwitchPlatform Flash Isprom
Top Page Image Contents