According to this document, I need to:

 assign 0 MHz toggle rate to Toggle Rate assignments for the pin in the Assignment Editor

to place a non-differential pin close to a differential one. However, when in the Assignment Editor, I cannot find "Toggle Rate" as an appropriate Assignment Name. (There is a long list of possible assignments, but none is called "Toggle Rate".)

How can I assign the toggle rate in Quartus II?


In the main menu (File|Edit|etc.) choose Assignments->Assignment Editor (or simply Ctrl+Shift+A).

A window/tab with the assignments will open. In there you can add the assignment that you want, which in this case is I/O Maximum Toggle Rate for the related pin.

The drop-down list under Assignment Name is long and alphabetically ordered, and since the option you are looking for starts with I instead of the more logical T, it is easy to miss.

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  • 1
    \$\begingroup\$ I found the "Power Toggle Rate", but not "I/O Maximum Toggle Rate". Thanks. \$\endgroup\$ – Randomblue Jan 22 '13 at 19:44

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