ModuleWare Reference Guide - Hornad

Sequential PartsBank of Flip-Flops (dff)If rst is asynchronous (rst_type = AsyncActiveHigh or rst_type = AsyncActiveLow):q = rst_val if rst is active (irrespective of the clk trigger)else at every enabled clk trigger (rising edge if clk_type = Rising or falling edge if clk_type =Falling):q = din otherwiseqb = NOT(rst_val) ifrst is active (irrespective of the clk trigger)else at every enabled clk trigger (rising edge if clk_type = Rising or falling edge if clk_type =Falling):qb = NOT(din) otherwiseTruth TableThe following tables are for positive polarities. For negative polarities, invert the values.Asynchronous high reset and positive polarities:Table 8-1. Bank of Flip-Flops Truth Table — Asynchronous High Reset,Positive Polaritiesclk_en clk rst q qb- - 1 rst_val NOT(rst_val)0 posedge 0 q qb1 posedge 0 din NOT(din)Synchronous high reset and positive polarities:Table 8-2. Bank of Flip-Flops Truth Table — Synchronous High Reset,Positive Polaritiesclk_en clk rst q qb0 - - q qb1 posedge 1 rst_val NOT(rst_val)1 posedge 0 din NOT(din)ModuleWare Reference Manual, Library Version 1.9 171September 18, 2008