Specifications

240 Appendix B— Device Pin Types
Pin Types Table
The following table lists the function of each of the pin types available in
LogicWorks. The Output Value Mapping column specifies how output val-
ues specified by the model are mapped to actual pin drive values.
Pin Type Description Initial
Value
Output
Value
Mapping
IN Input—this is the default for pins created
using the DevEditor tool. This setting is
used for all pins on discretes except those
with some digital function. No output value
can be placed on an input pin.
HIGHZ No output
drive
allowed.
OUT Output—always enabled. DONT01 None.
3STATE Output—can be disabled (i.e. high-Z).
Note: The three-state capability only exists
for specific primitive types that have a
three-state enable pin. For other types, this
will behave like OUT.
DONT01 None.
BIDIR Bidirectional. DONT01 None.
OC Open collector output—pulls down but not
up.
DONT0Z HIGH maps
to HIGHZ.
BUS Bus pin—This does not represent a
physical signal but is a graphical
representation of a group of internal pins,
each having its own type. Bus pins cannot
have values and are not supported on
primitive device types.
None None.
LOW Output—always driving low. LOW All values
converted to
LOW.
HIGH Output—always driving high. HIGH All values
converted to
HIGH.
LW Reference.bk Page 240 Monday, December 15, 2003 5:59 PM