Output devices : LCD and communication between multiple devices with two wire.ĭigital pin 2-13 can be used as PWM output with analogWrite() to write pwm value from 0-255.It’s alternative of DAC for low cost system to get analog signal at output by using filter. Function used are wire.begin() to start I2C conversion, with wire.Read() to read i2c data and wire.Write() to write i2c data. I2C Pins:ĭigital pin 20 for SDA and 21 for SCK (Speed 400khz) to enable two wire communication with others devices. Programming AVR controller, communication with others peripheral like LCD and SD card with four-line communication at high speed. SPI enable bit must be set to start communication with other devices. These pins are used for serial communication with SPI protocol for communication between 2 or more devices.
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