Port E (PE[3:0])

Port E is a 4-bit bi-directional I/O port with internal pull-up resistors (selected for each pin). The Port E output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port E pins that are externally pulled low will source current if the pull-up resistors are activated. The Port E pins are tri-stated during a reset condition even if the clock is not running.