Xilinx 8.2i guide

Chapter 12: TRACE

For errors in which the path delays are broken down into individual net and component delays, the report lists each physical resource and the logical resource from which the physical resource was generated.

As in the other three types of reports, descriptive material appears at the top. A timing summary always appears at the end of the reports.

The following sample error report (error.twr) represents the output generated with this TRACE command:

trce –e 3 ramb16_s1.ncd clkperiod.pcf –o error_report.twr

------------------------------------------------------------------

Xilinx TRACE

trce -e 3 ramb16_s1.ncd clkperiod.pcf -o error_report.twr

Design	file:	ramb16_s1.ncd
Physical constraint file: clkperiod.pcf
Device,speed:		xc2v250,-5 (ADVANCED 1.84 2001-05-09)
Report	level:	error report

------------------------------------------------------------------

==================================================================

Timing constraint: TS01 = PERIOD TIMEGRP "clk" 10.333ns ;

0 items analyzed, 0 timing errors detected.

------------------------------------------------------------------

==================================================================

Timing constraint: OFFSET = IN 3.0 ns AFTER COMP "clk" TIMEGRP "rams" ;

18 items analyzed, 0 timing	errors detected.
Maximum allowable offset is	9.224ns.

------------------------------------------------------------------

==================================================================

Timing constraint: TS02 = MAXDELAY FROM TIMEGRP "rams" TO TIMEGRP "pads" 8.0 nS ;

1 item analyzed, 1 timing error detected. Maximum delay is 8.587ns.

------------------------------------------------------------------

Slack:	-0.587ns (requirement - data path)
Source:	RAMB16.A
Destination:	d0
Requirement:	8.000ns
Data Path Delay:	8.587ns (Levels of Logic = 2)
Source Clock:	CLK rising at 0.000ns

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Development System Reference Guide

8.2i specifications

Xilinx 8.2i is a significant version of the Xilinx ISE (Integrated Software Environment) that emerged in the early 2000s, marking an important milestone in the world of FPGA (Field-Programmable Gate Array) development. This version introduced a slew of advanced features, technologies, and characteristics that made it an indispensable tool for engineers and developers in designing, simulating, and implementing digital circuits.

One of the standout features of Xilinx 8.2i is its enhanced design entry capabilities. This version supports multiple design entry methods, including schematic entry, VHDL, and Verilog HDL, giving engineers the flexibility to choose their preferred approach. The integrated environment provides user-friendly graphical interfaces, making it accessible for both novice and experienced users.

Xilinx 8.2i's synthesis tools have been improved to enable more efficient design compilation and optimization. The new algorithms used in this version facilitate faster synthesis times while reducing power consumption and improving performance. Furthermore, it features support for advanced FPGA architectures, which allows for the implementation of more complex designs with greater efficiency.

The implementation tools in Xilinx 8.2i include advanced place and route capabilities, utilizing state-of-the-art algorithms for optimized resource usage. These tools enable designers to make better use of FPGA resources, ensuring that designs fit within the constraints of the target device while maximizing performance.

Another key characteristic of Xilinx 8.2i is its extensive support for various Xilinx devices such as the Spartan, Virtex, and CoolRunner series. This compatibility ensures that developers can leverage the powerful features of these FPGA families, including high-speed transceivers and DSP slices.

Xilinx 8.2i also places a strong emphasis on simulation and verification. The version integrates with various simulation tools, allowing for thorough testing of the designs before implementation. This reduces the risk of errors and ensures that the final product meets specifications.

In addition, this version includes support for design constraints, enabling engineers to specify timing, area, and other critical design parameters. By accommodating constraints, Xilinx 8.2i helps in achieving reliable and efficient designs tailored to project needs.

In summary, Xilinx 8.2i is a robust software development tool that enhances the design process for FPGAs. Its comprehensive features, including multiple design entry options, advanced synthesis and implementation tools, extensive device support, and strong simulation capabilities, make it a valuable resource for engineers and developers striving for innovation in digital design.

Xilinx 8.2i manual Trce -e 3 ramb16s1.ncd clkperiod.pcf -o errorreport.twr

Models: 8.2i

Chapter 12: TRACE

trce –e 3 ramb16_s1.ncd clkperiod.pcf –o error_report.twr

RAMB16.A

Development System Reference Guide

8.2i specifications