PCI32 Interface v3.0
4
www.xilinx.com
DS206 August 31, 2005
Product Specification v3.0.151
Other FPGA resources that can be used in conjunction with the core to enable efficient implementation
of a PCI system include:
• Block SelectRAM™ memory. Blocks of on-chip ultra-fast RAM with synchronous write and
dual-port RAM capabilities. Used in PCI designs to implement FIFOs.
• SelectRAM memory. Distributed on-chip ultra-fast RAM with synchronous write option and
dual-port RAM capabilities. Used in PCI designs to implement FIFOs.
• Internal three-state bus capability for data multiplexing.
The interface is carefully optimized for best possible performance and utilization in Xilinx FPGA
devices.
Smart-IP Technology
Drawing on the architectural advantages of Xilinx FPGAs, Xilinx Smart-IP technology ensures the
highest performance, predictability, repeatability, and flexibility in PCI designs. The Smart-IP technol-
ogy is incorporated in every PCI interface.
Xilinx Smart-IP technology leverages the Xilinx architectural advantages, such as look-up tables and
segmented routing, as well as floorplanning information, such as logic mapping and location con-
straints. This technology provides the best physical layout, predictability, and performance. In addi-
tion, these features allow for significantly reduced compile times over competing architectures.
To guarantee the critical setup, hold, minimum clock-to-out, and maximum clock-to-out timing, the
PCI interface is delivered with Smart-IP constraint files that are unique for a device and package com-
bination. These constraint files guide the implementation tools so that the critical paths always are
within specification.
Xilinx provides Smart-IP constraint files for many device and package combinations. Constraint files
for unsupported device and package combinations may be generated using the web-based constraint
file generator.
Functional Description
