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# 56345

MIG 3.92 Spartan-6 MCB DDR2/DDR3 - Figure 3-3 of UG388 shows CLKOUT2 instead of CLKOUT3

Description

In the Spartan-6 FPGA Memory Controller User Guide (UG388), on page 38, Figure 3-3 shows that the PLL output, CLKOUT2, is used for calibration (see first snapshot below).

 

http://www.xilinx.com/support/documentation/user_guides/ug388.pdf

 

However, on the next page, page 39 (Modifying the Clock Setup) it says that CLKOUT2 is for the user clock, while CLKOUT3 is for calibration (see second snapshot below)

 

Which is correct?

 

 

56345capture.jpg

 

Solution

Figure 3-3 is incorrect.

CLKOUT2 is for UI logic (traffic generation or user traffic).

CLKOUT3 is for the DRP clock, which is used by the calibration.

In Figure 3-3, CLKOUT2 should read CLKOUT3.

 

Fixed Version: No plans to be fixed in (UG388)

 

Revision History:

9/9/2014 - Initial Release

AR# 56345
Date Created 06/12/2013
Last Updated 12/22/2015
Status Active
Type General Article
Devices
  • Spartan-6
Tools
  • ISE Design Suite
IP
  • MIG Virtex-6 and Spartan-6