 | Port Declaration:Port Mode Examples-- Notes Page -- |  |
| Port Declaration:Port Mode Examples-- Notes Page -- | |
These two examples show the use of the port mode. The first case indicates a port of mode IN. This data is coming in the port and can only be read by the device. The second example shows a port of mode OUT where the signal may be "driven" by this component. Note that in the 1076-1987 VHDL Standard, a component could not read its own OUT ports; this was changed in the 1076-1993 VHDL Standard.