horzonbluz
Full Member level 4
Some questions in DFT!
Hello, friends. I have some questions in DFT. I don't know how to solve these.
1. I have three memories in my design. I set_scan_element false for them when do DFT. But it still report that :
Warning:Cell VPOST_FILTER/FILTER_C_LINE_BUFFER/T018SRF3X_368X16M4 has no function specification.
Warning: Cell VPOST_FILTER/FILTER_Y_LINE_BUFFER/T018SRF3X_720X8M4 has no function specification.
Warning: Cell VPOST_OSD/BIST_RA1SH_SR256X24S/T018SRF3X_256X24M4 has no function specification.
Warning: the required number of observe test points can not be met. (TEST-147)
Warning: Violations occurred during test design rule checking. (TEST-124)
How to solve this kind violation?
2. When i write the netlist that has been inserted scan chains, there are "asign" statement in my netlist. I have try to remove them from netlist and add some command like below:
set save_place [current_design]
foreach_in_collection design [ get_designs "*" ] {
current_design $design
set_fix_multiple_port_nets -all -outputs -feedthroughs -constants -buffer_constants;
}
current_design $save_place
set_fix_multiple_port_nets -all -outputs -feedthroughs -constants -buffer_constants;
unset save_place;
But these commands can't affect the "assign" statement written in my netlist.
3. How to decide the observe and control points number?
I want to use set_testability_configuration command to set observe and control points neumber? Who can tell me how to set it?
Hello, friends. I have some questions in DFT. I don't know how to solve these.
1. I have three memories in my design. I set_scan_element false for them when do DFT. But it still report that :
Warning:Cell VPOST_FILTER/FILTER_C_LINE_BUFFER/T018SRF3X_368X16M4 has no function specification.
Warning: Cell VPOST_FILTER/FILTER_Y_LINE_BUFFER/T018SRF3X_720X8M4 has no function specification.
Warning: Cell VPOST_OSD/BIST_RA1SH_SR256X24S/T018SRF3X_256X24M4 has no function specification.
Warning: the required number of observe test points can not be met. (TEST-147)
Warning: Violations occurred during test design rule checking. (TEST-124)
How to solve this kind violation?
2. When i write the netlist that has been inserted scan chains, there are "asign" statement in my netlist. I have try to remove them from netlist and add some command like below:
set save_place [current_design]
foreach_in_collection design [ get_designs "*" ] {
current_design $design
set_fix_multiple_port_nets -all -outputs -feedthroughs -constants -buffer_constants;
}
current_design $save_place
set_fix_multiple_port_nets -all -outputs -feedthroughs -constants -buffer_constants;
unset save_place;
But these commands can't affect the "assign" statement written in my netlist.
3. How to decide the observe and control points number?
I want to use set_testability_configuration command to set observe and control points neumber? Who can tell me how to set it?
