Yes. The const modifier means that this code
cannot change the value of the variable, but that does not mean that
the value cannot be changed by means outside this code. For
instance, in the example in FAQ 8, the timer structure was accessed
through a volatile const pointer.
The function itself did not change the value of the timer, so it was
declared const. However, the value was changed by hardware on the
computer, so it was declared volatile. If a variable is both const
and volatile, the two modifiers can appear in either order.