Xilinx M401 User Manual

Xilinx M401 User Manual Manual pdf 15 page image

ML401/ML402/ML403 Evaluation Platform www.xilinx.com 15UG080 (v2.5) May 24, 2006Detailed DescriptionRDigitally Controlled Impedance (DCI)Some FPGA banks can support the DCI feature in Virtex-4 FPGAs. Support for DCI issummarized in Table 2.Table 2: DCI Capability of FPGA BankFPGA Bank DCI Capability1 Not supported.2 Not supported.3 Optional: User must remove resistors R234 and R235 and must installresistors R222 and R221.Note: Use of DCI will disable the use of GPIO LED [2] and [3].4 Not supported.5 Optional: User must install resistors R224 and R225 to use DCI. In bitgen,the switch "-g DCIUpdateMode:Quiet" must also be used.Note: Use of DCI will disable user control of the DDR_CS_N and DDR_CKEsignals.6 Not supported.7 Optional: User must install resistors R289 and R290.Note: This will disable the use of two I/O pins on the expansion connector J5(pin 38 and 40).8 Yes, 49.9Ω resistors are installed.9 aa. Bank 9 and 10 are non-connected pins in the case of the ML403 board with XC4VFX12-FF668.Yes, 49.9Ω resistors are installed.10 a Not supported.www.BDTIC.com/XILINX