The XC4000 families of Field-Programmable Gate Arrays (FPGAs) provide the benefits of custom CMOS VLSI, while avoiding the initial cost, time delay, and inherent risk of a conventional masked gate array. The XC4000 families provide a regular, flexible, programmable architecture of Configurable Logic Blocks (CLBs), interconnected by a powerful hierarchy of versatile routing resources, and surrounded by a perimeter of programmable Input/Output Blocks (IOBs). XC4000-family devices have generous routing resources to accommodate the most complex interconnect patterns.
XC4000A devices have reduced sets of routing resources, sufficient for their smaller size. XC4000H high I/O devices maintain the same routing resources and CLB structure as the XC4000 family, while nearly doubling the available I/O. The devices are customized by loading configuration data into the internal memory cells. The FPGA can either actively read its configuration data out of external serial or byteparallel PROM (master modes), or the configuration data can be written into the FPGA (slave and peripheral modes).
The XC4000 families are supported by powerful and sophisticated software, covering every aspect of design: from schematic entry, to simulation, to automatic block placement and routing of interconnects, and finally the creation of the configuration bit stream.
Since Xilinx FPGAs can be reprogrammed an unlimited number of times, they can be used in innovative designs where hardware is changed dynamically, or where hardware must be adapted to different user applications. FPGAs are ideal for shortening the design and development cycle, but they also offer a cost-effective solution for production rates well beyond 1000 systems per month.
Feature
– Abundant flip-flops
– Flexible function generators
– On-chip ultra-fast RAM
– Dedicated high-speed carry-propagation circuit
– Wide edge decoders
– Hierarchy of interconnect lines
– Internal 3-state bus capability
– Eight global low-skew clock or signal distribution network
• Flexible Array Architecture
– Programmable logic blocks and I/O blocks
– Programmable interconnects and wide decoders
• Sub-micron CMOS Process
– High-speed logic and Interconnect
– Low power consumption
• Systems-Oriented Features
– IEEE 1149.1-compatible boundary-scan logic support
– Programmable output slew rate
– Programmable input pull-up or pull-down resistors
– 12-mA sink current per output (XC4000 family)
– 24-mA sink current per output (XC4000A and XC4000H families)
• Configured by Loading Binary File
– Unlimited reprogrammability
– Six programming modes
• XACT Development System runs on ’386/’486-type PC, NEC PC, Apollo, Sun-4, and Hewlett-Packard 700 series
– Interfaces to popular design environments like Viewlogic, Mentor Graphics and OrCAD
– Fully automatic partitioning, placement and routing
– Interactive design editor for design optimization
– 288 macros, 34 hard macros, RAM/ROM compiler
