Xilinx MultiLINX Series Hardware User's Manual
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Contents
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Hardware User Guide1-4 Xilinx Development System• Works at multiple supply voltages (5 V, 3.3 V, and 2.5 V).• Supports JTAG configuration for all Xilinx devices.• Supports SelectMAP configuration mode for Virtex.Previous Cable VersionsThis section details considerations for using previous downloadcables with the Hardware Debugger Software.You can use Hardware Debugger software with all previous paralleland serial download cables. However, these previous cables can onlybe used to download a configuration bitstream, they cannot be usedfor readback.If you do use Hardware Debugger with a previous parallel or serialdownload cable version, keep the following points in mind.• Previous versions of the download cable were made to downloadXC3000 and XC2000 designs, not XC4000 designs. The basic limi-tation of the previous cables is that they do not have a PROG pinto initiate a re-program in XC4000 devices. They also do not havean INIT pin to check for Cyclical Redundancy Check (CRC)errors during configuration.Note To use a parallel download cable prior to the Parallel CableIII to download designs to the XC4000 family devices, you mustmanually toggle the PROG pin to low. PROG is active when it islow. (The Parallel Cable III has a wire for the PROG pin.)• Previous download cables do not support readback or verifica-tion.• For the PC, the download cable is a parallel cable, requiringconnection to the parallel port. (The XChecker cable is serial.)There are only two situations when you might prefer using previousdownload cables instead of the XChecker Cable or MultiLINX Cable.• You have circuit boards with header connectors keyed to matchthe previous cable headers. However, you could use theXChecker Cable with its flying lead connectors. Simply match thelabeled flying leads to the equivalent signals on your system.• You have circuit boards where power consumption is a criticalfactor. (The XChecker Cable requires about 100 mA at 5 V and theMultiLINX Cable requires about 300mA at 5 V, 500mA at 3.3 V, |
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