Datasheet

23
BIG8051
MikroElektronika
page
17.0. Push buttons
The logic state of all microcontroller input pins may be changed by using push buttons. Jumper J10 is used to determine
the logic state to be supplied on the appropriate microcontroller pin by pressing a push button. The function of the pro-
tective resistor is to limit the maximum current, thus preventing the development system and peripheral modules from
being damaged in case a short circuit occurs. If needed, advanced users may shorten this resistor using jumper J12.
Right next to the push buttons, there is a RESET button used to reset the microcontroller.
Figure 17-2: Push buttons and port PORT0 connection schematic
Figure 17-1: Push buttons
By pressing any push button when jumper J10 is in the VCC position, a logic one (3.3V) will be applied to the appropriate
microcontroller pin, as shown in Figure 17-2.