Chapter 12: TRACE

R

Following is an example of clock-to-output propagation delays in the data sheet report:

Clock ck1_i to Pad

 

 

 

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

---+----------

+

 

 

 

 

clk (edge)

 

 

Destination Pad to PAD

 

 

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

--+----------

+

 

 

out1_o

 

16.691(R)

 

 

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

--+----------

+

 

 

Clock to Setup on destination clock ck2_i

 

----- -----+-------

+--------

+

--------+--------

+

 

Src/Dest Src/Dest Src/Dest Src/Dest

 

Source ClockRise/RiseFall/RiseRise/FallFall/Fall

-----------

+-------

+--------

+

--------+--------

+

ck2_i

12.647

ck1_i

10.241

-- --------+-------

+--------

+

--------+--------

+

The maximum propagation delay from each device input to each device output is reported if a combinational path exists between the device input and output. When two or more paths exist between a device input and output, the worst-case propagation delay is reported. One worst-case propagation delay is reported for every input and output combination in the design.

Following are examples of input-to-output propagation delays:

Pad to Pad

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

Source Pad

Destination PadDelay

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

+---------------

+-------

+

BSLOT0

D0S

37.534

 

BSLOT1

D09

37.876

 

BSLOT2

D10

34.627

 

BSLOT3

D11

37.214

 

CRESETN

VCASN0

51.846

 

CRESETN

VCASN1

51.846

 

CRESETN

VCASN2

49.776

 

CRESETN

VCASN3

52.408

 

CRESETN

VCASN4

52.314

 

CRESETN

VCASN5

52.314

 

CRESETN

VCASN6

51.357

CRESETN

VCASN7

52.527

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

+-------------

+---------

 

User-Defined Phase Relationships

Timing separates clock-to-output and maximum propagation delay ranges for user- defined internal clocks in the data sheet report. User-defined external clock relationships shall not be reported separately. They are broken out as separate external clocks.

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Development System Reference Guide

Page 228
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Xilinx 8.2i manual BSLOT0 D0S

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.