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Altera_Forum's avatar
Altera_Forum
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13 years ago

Critical Warnings on altera_reserved_tck hold and removal time violations

Hi,

The Simple Socket Server example, after the synthesis, gives me three critical warnings: "Timinig Requirements not met"...in TimeQuest Timing Analyzer report I found "in red" two headings: Hold and Removal Time for "altera_reserved_tck" clock.

In DE4_Ethernet.sdc file I found three constrains about this altera_reserved_tck clock:

create_clock -name {altera_reserved_tck} -period 100.000 -waveform { 0.000 50.000 } [get_ports {altera_reserved_tck}]

set_clock_groups -asynchronous -group [get_clocks {altera_reserved_tck}]

set_clock_groups -asynchronous -group [get_clocks {altera_reserved_tck}]

Do you have any opinion about that???

Regards

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    13 years ago

    Did you get any help, I'm getting the same critical warnings, i was able to reduce the amount of slack by turning some of the features in the settings off, but is still get a little negative slack,, how were you able to solve your problem......i cannot completely remove the negative slack, some posts ive read say make it a false path, that doesn work, some say just ignore this pin, i cannot do that because untill it disappear my signaltap wont work...someone please help