ATMEGA128-16AU Detailed explanation of pin function specifications and circuit principle instructions

The ATMEGA128-16AU is a microcontroller from Atmel, which is now a part of Microchip Technology. The model name "ATMEGA128" represents the microcontroller series, and the "16AU" specifies certain characteristics like clock speed and package type.

Pinout and Pin Function Specifications for ATMEGA128-16AU:

The ATMEGA128-16AU comes in a 64-pin package. Here is the breakdown of the pin functions:

Pin Number Pin Name Pin Function Description 1 VCC Supply voltage pin. Connect to a positive supply voltage. 2 GND Ground pin. Connect to the system ground. 3 Port A Pin 0 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 4 Port A Pin 1 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 5 Port A Pin 2 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 6 Port A Pin 3 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 7 Port A Pin 4 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 8 Port A Pin 5 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 9 Port A Pin 6 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 10 Port A Pin 7 Input/Output pin for Port A. Functions as a digital I/O pin, can be used for analog inputs. 11 Port B Pin 0 Input/Output pin for Port B. 12 Port B Pin 1 Input/Output pin for Port B. 13 Port B Pin 2 Input/Output pin for Port B. 14 Port B Pin 3 Input/Output pin for Port B. 15 Port B Pin 4 Input/Output pin for Port B. 16 Port B Pin 5 Input/Output pin for Port B. 17 Port B Pin 6 Input/Output pin for Port B. 18 Port B Pin 7 Input/Output pin for Port B. 19 Port C Pin 0 Input/Output pin for Port C. 20 Port C Pin 1 Input/Output pin for Port C. 21 Port C Pin 2 Input/Output pin for Port C. 22 Port C Pin 3 Input/Output pin for Port C. 23 Port C Pin 4 Input/Output pin for Port C. 24 Port C Pin 5 Input/Output pin for Port C. 25 Port C Pin 6 Input/Output pin for Port C. 26 Port C Pin 7 Input/Output pin for Port C. 27 Port D Pin 0 Input/Output pin for Port D. 28 Port D Pin 1 Input/Output pin for Port D. 29 Port D Pin 2 Input/Output pin for Port D. 30 Port D Pin 3 Input/Output pin for Port D. 31 Port D Pin 4 Input/Output pin for Port D. 32 Port D Pin 5 Input/Output pin for Port D. 33 Port D Pin 6 Input/Output pin for Port D. 34 Port D Pin 7 Input/Output pin for Port D. 35 RESET Reset pin. A low level on this pin resets the microcontroller. 36 XTAL1 Crystal oscillator input. Connect to the crystal oscillator circuit. 37 XTAL2 Crystal oscillator output. Connect to the crystal oscillator circuit. 38 AVCC Supply voltage pin for the analog part. 39 AREF Analog reference voltage pin. Connect to an external reference voltage for analog inputs. 40 ADC0 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 41 ADC1 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 42 ADC2 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 43 ADC3 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 44 ADC4 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 45 ADC5 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 46 ADC6 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 47 ADC7 Analog-to-Digital Converter input pin. Connect to analog signal for conversion. 48 T0 Timer/Counter 0 input pin. 49 T1 Timer/Counter 1 input pin. 50 T2 Timer/Counter 2 input pin. 51 ICP1 Input Capture Pin 1. Used with Timer/Counter 1. 52 OC1A Output Compare Pin 1A. Used with Timer/Counter 1. 53 OC1B Output Compare Pin 1B. Used with Timer/Counter 1. 54 OC2A Output Compare Pin 2A. Used with Timer/Counter 2. 55 OC2B Output Compare Pin 2B. Used with Timer/Counter 2. 56 SCL I2C clock line. Used for communication with I2C devices. 57 SDA I2C data line. Used for communication with I2C devices. 58 AIN0 Analog input pin 0 for the Analog Comparator.