ModuleWare Reference Guide - Hornad

AND Primitive (pand)Primitive PartsAND Primitive (pand)This is a highly parameterized AND primitive which has a user-specifiednumber of inputs and a scalar output.The rise time is controlled by an enumerated parameter rise_delay and thefall time is controlled by an enumerated parameter fall_delay. The smallerof the two delays applies on output transitions to X. If there is no delayspecification, there is no propagation delay through the gate. The width ofthe port din determines the number of inputs for this primitive.The strength level can be controlled by the enumerated parameters strength0_type andstrength1_type. If strength0_type is not specified where strength1_type is specified,strength0_type is taken as Strong0. Whereas if strength1_type is not specified wherestrength0_type is specified, strength1_type is taken as Strong1.This part is equivalent to n AND gates, where n is the width of the port.Functiondout = din0 AND din1 AND din2 AND…Truth TableTable 10-3. AND Primitive Truth Tablepand 0 1 X Z0 0 0 0 01 0 1 X XX 0 X X XZ 0 X X XParametersTable 10-4. AND Primitive ParametersParameter Values Defaultdin Number of inputs (must be >= 1) Automaticfall_delayrise_delaystrength0_typestrength1_typeInteger value of the fall time for the gateInteger value of the rise time for the gateNone, Supply0, Strong0, Pull0, Weak0, HighZ0None, Supply1, Strong1, Pull1, Weak1, HighZ100NoneNoneDesign Rule Checks• An error is issued if the width of any port cannot be determined or if both strength types areset to HighZ.• A warning is issued and HDL generation fails for this part if any of ports are not connected.ModuleWare Reference Manual, Library Version 1.9 233September 18, 2008