26th February 2009, 20:11 #1
Junior Member level 1
set_dft_signal scan clock specification
Is it possible to define a pin as the scan clock?
Ex the output of a clock gen module as the scan clock in the set_dft_signal. I have been using the following statement set_dft_signal -view existing_dft -type ScanMasterClock -port CLK -timing [list 45 55], but now I came across a situation where I need to use the output port of an internal module.
Any help will be appreciated
26th February 2009, 20:11
26th February 2009, 20:52 #2
Junior Member level 3
Re: set_dft_signal scan clock specification
I only used ports as ScanClock. But for scan shift/scan output stuff, I used internal signals, because I did not manually connect them to ports. I left the job to stitching tool to connect them.
set_dft_signal -view spec -type ScanDataOut -port ioxxx -hookup_pin "uxxx/xxx"
So it seems that you need to use "spec" instead of "existing" and use "hookup_pin" opt.
But you should be able to manually connect, since dft can only control ports... the scan clock should be eventually from outside of the chip