Buttons And Leds - Mikroe CLICKER 4 for STM32 User Manual

4. Buttons
and LEDs
1
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.
2
CLICKER 4 for STM32 U S E R M A N U A L
Figure 4: Buttons and LEDs view