Specifications

Simulation Primitive Types 97
Simulation Primitive Types
In LogicWorks primitive device types, the function of each pin is deter-
mined by its type (i.e., input or output) and by its sequential position in the
device’s Pin List (as seen when the part is opened in the DevEditor). Pin
name is not significant. Each type has specific rules about the ordering of
pins. Failure to adhere to these rules will result in incorrect simulator oper-
ation.
For many primitive types, certain control inputs and outputs can be omitted
to create simplified device types. For example, on flip–flop types, the Set
and Reset inputs can be omitted.
 See Appendix A, Primitive Device Pin Summary, for information on
which combinations of inputs are allowable and on the required order.
The rest of this chapter provides information on these simulation primitive
types. Because their simulation functions are hard–coded, they occupy
much less memory space than subcircuit devices and simulate more effi-
ciently.
NOTE: 1) In primitive devices, logic functions are associated with pins on a device
symbol according to pin order. When creating primitive devices using the
DevEditor tool, you must be aware of the pin order requirements for the
device type you are using. Refer to the description of each type in this
chapter and to Appendix A, Primitive Device Pin Summary.
2) Bus pins are not supported on primitive device types.
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