ModuleWare Reference Guide - Hornad

Sequential PartsModulo Counter (modcntr)This table is for asynchronous high reset.Table 8-26. Modulo Counter Truth Table — LFSR Counter, AsynchronousHigh Resetmode clk_en clk rst creg (n-1) creg (n)- 0 - 0 - creg(n-1)- - - 1 - resetvalModulo 1 posedge 0 0 reloadvalWait-for 1 posedge 0 0 {newmsb, creg(n-1)} >> 1- 1 posedge 0 ≠ 0 {newmsb, creg(n-1)} >> 1For Binary Decrementing CounterThis table is for synchronous high reset.Table 8-27. Modulo Counter Truth Table — Binary Decrementing Counter,Synchronous High Resetmode clk_en clk rst creg (n-1) creg (n)- 0 - - - creg(n-1)- 1 - 1 - countModulo 1 posedge 0 0 count -1Wait-for 1 posedge 0 0 creg(n-1) - 1- 1 posedge 0 ≠ 0 creg(n-1) - 1This table is for asynchronous high reset.Table 8-28. Modulo Counter Truth Table — Binary Decrementing Counter,Asynchronous High Resetmode clk_en clk rst creg (n-1) creg (n)- 0 - 0 - creg(n-1)- - - 1 - countModulo 1 posedge 0 0 count -1Wait-for 1 posedge 0 0 creg(n-1) - 1- 1 posedge 0 ≠ 0 creg(n-1) - 1ModuleWare Reference Manual, Library Version 1.9 193September 18, 2008