Download Xilinx System Generator for DSP User Guide

Supporting New Boards through JTAG Hardware Co-Simulation
Once you have determined which devices are in the Boundary Scan Chain, you must
determine the instruction register lengths for each device. The table below specifies the
instruction register lengths for various Xilinx families. You may use the auto detection
capability of SBDBuilder to determine the instruction register lengths. If this utility does
not work, you may use the following table to find the instruction register lengths for a
particular part family.
Family
IR Length
System_ACE™-CF
8
Spartan®-3, 3E, 3A, 3AN, 3A DSP
6
Spartan-6 LX, LXT
6
Virtex®-4 LX, SX
10
Virtex®-4 FX 12, 20
10
Virtex®-4 FX 40, 60, 100, 140
14
Virtex®-5 LX, LXT, SXT
10
Virtex®-5 FX 30T, 70T
10
Virtex®-5 FX 100T, 130T, 200T
14
Virtex®-6 LX, LXT
10
Platform Flash XCFxxS
8
Platform Flash XCFxxP
16
System Generator for DSP User Guide
UG640 (v 14.2) July 25, 2012
www.xilinx.com
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