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AR# 23736

9.1i EDK - OPB_MDM v2.00.a - MDM clock must be twice as fast as System ACE clock for ELF load


ELF files loaded with the "genace.tcl" script are not loaded correctly when the OPB MDM is not running at least twice as fast as the System ACE controller.  


For example, if using the following "genace.opt" file to create an ".ace" file for the ML401:  



-hw implementation/download.bit  

-ace implementation/system.ace 

-board pml401 

-target mdm  

-elf TestApp_Peripheral/executable.elf 


If the OPB is running at 50 MHz (System ACE clock is 33 MHz), TestApp_Peripheral/executable.elf is not loaded after configuration. If the OPB clock is raised to 100 MHz, then it is consistently loaded and executes correctly.


Several tests have shown that the optimal ratio to properly load the ".elf" file is a 2:1 ratio, even though smaller ratios have successfully loaded the ".elf" file. 


This problem has been fixed in the latest EDK 9.1i Service Pack, available at: 

The first service pack containing the fix is EDK 9.1i Service Pack 2.

AR# 23736
Date Created 09/04/2007
Last Updated 05/20/2014
Status Archive
Type General Article