Section 16.4, A.6.11, Syntax 16-1
clocking_decl_assign (BNF)
In 16.4, APPEND the following paragraph
to the end of the subclause
In a clocking block
any expression assigned to a signal in its declaration shall be an expression
that would be legal in a port connection to a port of any of the directions
specified in the declaration. For
example, it would be illegal to assign an inout signal an expression in its
declaration that would be illegal in a port connection to an inout
port.
In A.6.11 and Syntax 16-1,
REPLACE
WITH
clocking_decl_assign ::=
signal_identifier [ = hierarchical_identifier expression ]