摘要：1. quartus setup 1.1 assignment-->setting 1.2 editor-> sdc file case sensitive2. core timing 2.1 create_clock 2.2 derive_pll_clockcreate_generated_clocktransceiver_clock 2.3 derive_clock_uncertainty 2.4 set_clock_groupsun-relatedoptions -asynchronous,-exclusive ASIC, no matters in FPG... 阅读全文

摘要：setup and hold relationships1. default2. multicycles : choose different clock edges of the existing waveforms.3. max and min : modify setup and hold relationships to arbitrary values.max and mindevice-centric constraintssystem-centric constraintsmax min as substitutes for these device-centri... 阅读全文

摘要：multicycles 1. determining multicycle relationship in 5 steps 1.1 default setup relationship = set_multicycle_path -setup 1 1.2 setup relationship = default_setup_relation + (MC_SETUP_VALUE -1)*clock_period; 1.3 source-synchronous interface :MC_SETUP_VALUE maybe 0 1.4 -start : laun... 阅读全文

摘要：话虽如此The same as saying.... however, never the less, yet, on the other hand.Usually it means that they are about to contradict what they just said, or follow up with some exception to what they just said. It implies that they wish to acknowledge that there is more than one side to an issue.For exampl 阅读全文

摘要：If you have done something wrong and you brazen it out, you behave confidently in order not to appear ashamed, even though you probably do feel ashamed. If you are caught simply argue that `everyone does it' and brazen it out...V it P The president brazened out his misdeeds...V P n (not pron) St 阅读全文