An interface object has one of the following modes in

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ne of the following modes: in. The value of the interface object may only be read. In addition, any attributes is allowed to be read, but it must not be updated. Reading an attribute27 of the interface object may be read, except that attributes is allowed, unless the interface object is a subprogram signal parameter and the attribute is one of 'STABLE, 'QUIET, 'DELAYED, and 'TRANSACTION, `DRIVING, or `DRIVING_VALUE28 of a subprogram signal parameter may not be read within the corresponding subprogram29. For a file object, operation ENDFILE is allowed. out. The value of the interface object may be updated is allowed to be updated, but it must not be read30. Reading the attributes of the interface element, other than the predefined attributes 'STABLE, 'QUIET, 'DELAYED, 'TRANSACTION, 'EVENT, 'ACTIVE, 'LAST_EVENT, 'LAST_ACTIVE, and 'LAST_VALUE, is allowed. No other reading is allowed. inout. The Reading and updating the31 value of the interface object may be both read and updated is allowed32. Reading the attributes of...
View Full Document

This note was uploaded on 09/09/2009 for the course EECS 318 taught by Professor Saab during the Fall '01 term at Case Western.

Ask a homework question - tutors are online