Datasheet

21
BIG AVR 6 Development System
MikroElektronika
page
17.0. 3XVK%XWWRQV
The logic state of all microcontroller input pins may be changed by means of push buttons. Jumper J12 is used to determine the logic
state to be applied to the desired microcontroller pin by pressing 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 J13. Right next to the push buttons, there is a RESET button
which is used to provide the MCLR pin with the microcontroller reset signal over the on-board programmer.
)LJXUH: Push buttons and port PORTC connection schematic
)LJXUH: Push buttons
By pressing any push button when jumper J12 is in the VCC position, a logic one (5V) will be applied to the appropriate microcontroller
pin as shown in Figure 17-2.
Jumper J12 used for selecting
logic state to be applied to the
pin by pressing push button
RESET button
Jumper J13 used to shorten
protective resistor
Push buttons used for simulating
digital inputs