01-27-2014 06:51 AM
I wish to post a issue I faced while building system with emc to connect numonyx flash device in my design.
In emc configuration when I am choosing numonyx flash device it will generate mem_wait signal which is a handshaking signal for the proper communication between numonyx flash and the processor.
I made mem_wait signal and other emc signals such as mem_wen,mem_ren,mem_cen,mem_ben etc., All pins are well assigned when i am building. (for your information there is no error in ucf. I verified it) except mem_wait signal and it displays an warning as follows:
WARNING:MapLib:701 - Signal axi_emc_0_Mem_WAIT_pin connected to top level port
axi_emc_0_Mem_WAIT_pin has been removed.
since it is removed I am not able to send my handshaking signals through mem_wait.
Kindly let me know the issue Why it is removed automatically removed from device?
And how to resolve it?
I am eagerly waiting for your ideas and suggestions.
Every suggestions is greatly appreciated. Thanks in advance.
01-27-2014 08:54 AM
This issue was reported and is fixed in 14.2 ISE. Can you please try this in a later version than ISE 14.2?
01-27-2014 08:37 PM
Thanks for the response Hem,
Sorry I forget to mention the version I used. Actually I am using Xilinx 14.6 version. Still I am facing the issue of that removal of mem_wait pin from my design. Can you give any suggestion for this?
Thanks in advance !
01-28-2014 12:14 AM
Can you attach your XMP,MHS and the UCF of your design?
01-28-2014 01:05 AM
02-10-2014 02:11 AM
To make hte wait pin prevent from being optimized, please use this parameter in your MHS.
02-17-2014 01:54 AM
I wish to have one clarification,
This parameter is for burst mode transfer of data(PARAMETER C_LINEAR_FLASH_SYNC_BURST = 1). If I am correct
should we set this parameter for normal data transmission (that is i mean byte by byte or 16 bit transmission of data)...?
Kindly clarify me,
02-27-2014 10:03 PM
There was a CR filed based on this issue that you were seeing. The number for it is 771045