Keyestudio 4DOF, Manual

Page: 72 / 249

69
3 Digital I/O
Arduino MEGA has 14 digital input/output
pins (of which 6 can be used as PWM
outputs).These pins can be configured as
digital input pin to read the logic value (0 or
1). Or used as digital output pin to drive
different modules like LED, relay, etc.
Using pinMode() , digitalWrite() , and
digitalRead() functions.
4 GND GND
5 AREF
Reference voltage (0-5V) for analog inputs.
Used with analogReference() .
Configures the reference voltage used for
analog input (i.e. the value used as the top
of the input range).
6 SDA IIC communication pin
7 SCL IIC communication pin
8
RESET
Button
You can reset your Arduino board,
9 D13 LED
There is a built-in LED driven by digital pin
13. When the pin is HIGH value, the LED is
on, when the pin is LOW, it's off.