ModuleWare Reference Guide - Hornad

Pulldown Primitive (ppulldown)Primitive PartsPulldown Primitive (ppulldown)This is a highly parameterized pulldown primitive which has a user-specifiednumber of scalar inputs. The width of the input port din determines the numberof inputs.This part places a logic value of logic 0 on the inputs connected to its input port.There are no delay specifications for this part because the signals this part places on theconnected nets continue throughout simulation without any variation.The strength level can be controlled by the enumerated parameter strength0_type.Functiondout = 00000…depending upon the number of inputsParametersTable 10-30. Pulldown Primitive ParametersParameter Values Defaultdin Number of inputs (must be >= 1) Automaticstrength0_type None, Supply0, Strong0, Pull0, Weak0 NoneDesign Rule Checks• An error is issued if the width of port dout cannot be determined or if both strength types areset to HighZ.• A warning is issued and HDL generation fails for this part if port dout is not connected.ModuleWare Reference Manual, Library Version 1.9 253September 18, 2008