Datasheet

22
Easy24-33 v6 Development System
MikroElektronika
page
18.0. Push Buttons
The logic state of all microcontroller input pins may be changed by means of push buttons. Jumper J6 is used to determine the logic
state to be applied to the desired microcontroller pin by pressing the appropriate push button. The function of the protective 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 such resistor using jumper J5. Right next to the push buttons, there is a RESET button
which is not directly connected to the MCLR microcontroller pin. The reset signal is generated by the programmer.
Figure 18-2: Microcontroller’s PORTB and push buttons connection schematic
Figure 18-1: Push buttons
Jumper J6 used for
selecting logic state to
be applied to the pin by
pressing push button
By pressing any push button when jumper J6 is in the VCC-3.3, a logic one (3.3V) will be applied to the appropriate microcontroller pin, as
shown in Figure 18-2.
By pressing a push button, the appropriate pin will be driven high (1)
RESET button
Jumper J5 used to
shorten protective resistor
Push buttons used to
excite microcontroller
inputs