Library

Sequential cells timing models

Figure 1  Sequential cell timing arcs Consider timing arcs of a sequential cell shown in Figure 1. For synchronous inputs, such as D pin (or SI, SE), there are following timing arcs: i.  Setup check arc (rising and falling) ii.  Hold check arc (rising and falling) For asynchronous inputs, such as CDN pin, there are… read more »

.lib

slew_lower_threshold_pct_rise : 30.00 slew_upper_threshold_pct_rise : 70.00 slew_upper_threshold_pct_fall : 70.00 slew_lower_threshold_pct_fall : 30.00 input_threshold_pct_rise : 50.00 output_threshold_pct_fall : 50.00 input_threshold_pct_fall : 50.00 output_threshold_pct_rise : 50.00 slew_derate_from_library : 0.50 To transition, general library data based on 10% – 90%, some library data based on 30% – 70%, but times 2 in order to modify range from 10%… read more »

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