Forum Discussion
Altera_Forum
Honored Contributor
14 years agoNot sure what your problem is.
IIRC the 'clk_en' signal is basically an indication that the specific custom instruction is being executed. There may be a requirement that some of the output signals not be asserted unless clk_en is asserted - in order to avoid messing up other custom instructions. What you do with any other signals is only constrained by your imagination (and the time available to execute the instruction).