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Altera_Forum
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21 years ago

Does Nios II custom instruction need clk_enable?

Hi all!!! http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif I have a Nios II project with 3 custom instructions that export the signals to a shared user logic, out of...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Till now, I never saw the clockenable going low on my system. So I just ingnore the input.

I think if you provide different custom instructions (with a defined nr), Altera generates the Mux logic. If you use only one custom instruction, you provide the mux (using the (N[7:0] signals).

I can not see ignoring the clock enable can do any harm. The system (or you in the second case) will decide to use the result or not.

stefaan