Actually, now I'm pretty confused. The

user_project_wrapper.lef

file says that

la_data_out[0]

is

DIRECTION OUTPUT TRISTATE

(makes sense),

la_data_in[0]

is

DIRECTION INPUT

and

la_oenb[0]

is

DIRECTION INPUT

, which doesn't make sense to me. Maybe I'm totally misunderstanding what

la_oenb

is.