Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Failed to route the following 1 signal(s)-- global signals

The device is : cyclone V 5CEFA9F31I7 The quartus version is 13.0 the fitter often failed and report the following message: error (170143): final fitting attempt was unsuccessful ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

This is odd. Quartus fills up my global clock assignments as well, but never outright fails if I have extra clocks in the design.

Maybe you can get away with preventing a reset from using a global driver. I force a reset synchronizer to local routing by using this assignment (there's probably a better way):

From

To

Assignment Name

Value

Enabled

...(remainder of path)...|altera_reset_synchronizer_int_chain_out

Global Signal

Off

Yes