BIG 8051 Manual
20
LEDs
There are a total of 64 LEDs on the development
board and can be used to visually indicate the state of
each microcontroller I/O pin. When active, an LED
indicates that a logic 1 is present on that particular
pin. To enable LEDs to illuminate, it is necessary to
select the appropriate port using DIP switch SW9.
There are 8 available ports labelled PORT0 through
PORT7.
