UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 16919

7.1i iMPACT CPLD CoolRunner XPLA3/CoolRunner-II - Why is the readback JEDEC smaller than the original JEDEC ?

Description

General Description:  

The JEDEC I programmed into my device is 34 Kb, but when I readback the JEDEC from the device, it is only 27 Kb. Has some information been lost? Is there a problem?

Solution

This is not a problem. The readback JEDEC is smaller than the original JEDEC because of the formatting. The CoolRunner and CoolRunner-II JEDEC files contain some formatting and non-essential comment text that make the files easier to read, which makes debugging and verifying easier. When a readback operation is performed, the JEDEC is extracted without the formatting information, and as a result, it is slightly smaller.

AR# 16919
Date Created 09/03/2007
Last Updated 05/15/2014
Status Archive
Type General Article