Mikroe CLICKER 4 for STM32, User Manual

Page: 9 / 16

4. Buttons
and LEDs
The board also contains eight buttons and LEDs, located on the front side.
Buttons
(1) can be used to apply the desired logic state to pins of the MCU
they are routed to. Pressing any of the two buttons can change the logic
state of the microcontroller pins from logic high (1) to logic low (0).
LEDs
(2) can be used to visually indicate a logic state of the specific pin.
The maximum current through a single LED is limited with the 4.7k resistor.
Each LED is connected to a MCU pin, and an active LED indicates that a
logic high (1) is present.
Figure 4: Buttons and LEDs view
1 2
BUTT
ONs AND LEDs
P A G E 9
CLICKER 4 for STM32 U S E R M A N U A L