ModuleWare Reference Guide - Hornad

Register PartsD Flip-Flop (adff)If rst and set are asynchronous:qqb= rst_val= set_val= NOT(rst_val)= NOT(set_val)if rst is active (irrespective of the clk trigger)if set is active (irrespective of the clk trigger)if rst is active (irrespective of the clk trigger)if set is active (irrespective of the clk trigger)and at every clk trigger (rising edge if clk_type = Rising; falling edge if clk_type = Falling):q = d if load is active or not connectedqb = NOT(d) ifload is active or not connectedTruth TablesThe tables are for positive polarities. For negative polarities, invert the values.Asynchronous rst and set:Table 7-1. D Flip-Flop Truth Table — Asynchronous rst and setload clk rst set q qb- - 1 - / NC rst_val NOT(rst_val)- - 0 / NC 1 set_val NOT(set_val)NC posedge 0 / NC 0 / NC d NOT(d)1 posedge 0 / NC 0 / NC d NOT(d)0 posedge 0 / NC 0 / NC q qbSynchronous rst and set:Table 7-2. D Flip-Flop Truth Table — Synchronous rst and setload clk rst set q qb- - 1 - / NC q qb- - 0 / NC 1 q qb- posedge 1 0 / NC rst_val NOT(rst_val)- posedge 0 / NC 1 set_val NOT(set_val)NC posedge 0 / NC 0 / NC d NOT(d)0 posedge 0 / NC 0 / NC q qb1 posedge 0 / NC 0 / NC d NOT(d)ModuleWare Reference Manual, Library Version 1.9 141September 18, 2008