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ML310 User Guide www.xilinx.com 13
UG068 (v1.01) August 25, 2004 1-800-255-7778
Virtex-II Pro
R
• Four levels of selectable pre-emphasis
• Five levels of output differential voltage
• Per-channel internal loopback modes
• 2.5V transceiver supply voltage
Virtex-II FPGA Fabric
Description of the Virtex-II Family fabric follows:
• SelectRAM memory hierarchy
♦ Up to 10 Mb of True Dual-Port RAM in 18 Kb block SelectRAM resources
♦ Up to 1.7 Mb of distributed SelectRAM resources
♦ High-performance interfaces to external memory
• Arithmetic functions
♦ Dedicated 18-bit x 18-bit multiplier blocks
♦ Fast look-ahead carry logic chains
• Flexible logic resources
♦ Up to 111,232 internal registers/latches with Clock Enable
♦ Up to 111,232 look-up tables (LUTs) or cascadable variable (1 to 16 bits) shift
registers
♦ Wide multiplexers and wide-input function support
♦ Horizontal cascade chain and Sum-of-Products support
♦ Internal 3-state busing
• High-performance clock management circuitry
♦ Up to eight Digital Clock Manager (DCM) modules
- Precise clock de-skew
- Flexible frequency synthesis
- High-resolution phase shifting
♦ 16 global clock multiplexer buffers in all parts
• Active Interconnect technology
♦ Fourth-generation segmented routing structure
♦ Fast, predictable routing delay, independent of fanout
♦ Deep sub-micron noise immunity benefits
• Select I/O-Ultra technology
♦ Up to 852 user I/Os
♦ Twenty two single-ended standards and five differential standards
♦ Programmable LVTTL and LVCMOS sink/source current (2 mA to 24 mA) per
I/O
♦ Digitally Controlled Impedance (DCI) I/O: on-chip termination resistors for
single-ended I/O standards
♦ PCI support(1)
♦ Differential signaling