这些文件也不一定完全正确,但可用作.sgdc文件的方便参考。 如果有generated clock需要工具帮忙推断的,需要use_inferred_clocks设置yes,enable_generated_clocks设置yes。然后在cdc_setup_generated_clocks.sgdc文件中查看。 6. 执行cdc_setup_check,检查工程文件的设置是否正确、完备。 如果有未约束的primary port,工具将...
使用generated_clock约束可以定义derived clock或generated clock(区别?).这些是穿过时序元件的output的时钟(hierarchical 的pin或net)。 为了让SpyGlass能够考虑这些约束,需要将enable_generated_clocks参数设置为yes。当设置为yes后: ■定义的generated_clock约束会再SpyGlass分析中生效。 ■若use_inferred_clocks参数设置为y...
This means that any internally generated clocks must be controlled by test clocks and any asynchronous set or reset signals must be forced inactive in test mode. The test mode is also used to make latches transparent and to break combinational feedback loops. SpyGlass DFT policy considers the ...
The generated constraints files may include some control signals in addition to the real clocks and resets. For instance, if enable and clock are combined through complex combinational logic and it is not possible to differentiate between the two, both enable and clock maybe reported as probable ...
AtrentaConfidential©2008AtrentaInc. SpyGlass ® -CDC Training A t r e n t a C o n f i d e n t i a l © 2 0 0 8 A t r e n t a I n c . 2 Agenda OverviewofAtrentaSpyGlassPlatformandSpyGlassEnvironment Lab1:GettingfamiliarwithSpyGlass ...
enable logic You have to review all clocks/reset to: • Confirm correctness, Add domain Info, add period/edge information, active value Command line to find clocks: spyglass –project training.prj –batch –goals cdc/cdc_setup ...