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AR# 62501

SDK14.6:AXI Quad SPI v2.00a :The GUI is not locked. What is the available setting for SCK_RATIO?

Description

As per (DS843) Table1 Notes9, 2 is the only value available for frequency ratio when the core is working in Dual/Quad modes in Legacy mode and Enhanced non-XIP mode, or in XIP mode.
 
However I can set any value in this field in the GUI.

What are the available settings for SCK_RATIO?

spi_setting.png



Solution

This is a known issue.

C_SCK_RATIO is fixed to 2 internally when the described operation mode is selected in Table 2.

This issue has been fixed in the latest Vivado version of the core.

The SCK_RATIO parameter is not selectable and fixed to 2 when these modes are used.

AR# 62501
Date Created 10/15/2014
Last Updated 03/05/2015
Status Active
Type General Article
Devices
  • Zynq-7000
Tools
  • EDK - 14
IP
  • AXI Quad SPI