The ATMEGA128L-8AU is part of the Atmel family of microcontrollers, which is now owned by Microchip Technology. The "128" in the model number indicates that it has 128KB of Flash memory. The "L" signifies that this particular model operates at a lower voltage range (typically 2.7V to 5.5V). The "8AU" in the part number indicates a specific packaging and speed grade for the chip.
Now, let's delve into the detailed pin function specifications, circuit principle, and full pinout list for the ATMEGA128L-8AU. I'll organize this into a table format to explain each of the pins in the microcontroller, followed by 20 frequently asked questions about the pin functions, in a clear question-and-answer format.
ATMEGA128L-8AU Full Pin Function Table
This microcontroller comes in a 64-pin package. Below is a comprehensive pinout for all the pins, with their functions and usage described. Note that the pin names are represented as they appear in the datasheet.
Pin Number Pin Name Function Description 1 VCC Power supply voltage (typically 5V). 2 GND Ground connection. 3 PORTA0 I/O pin (input/output) for PORTA. 4 PORTA1 I/O pin (input/output) for PORTA. 5 PORTA2 I/O pin (input/output) for PORTA. 6 PORTA3 I/O pin (input/output) for PORTA. 7 PORTA4 I/O pin (input/output) for PORTA. 8 PORTA5 I/O pin (input/output) for PORTA. 9 PORTA6 I/O pin (input/output) for PORTA. 10 PORTA7 I/O pin (input/output) for PORTA. 11 ADC0 Analog-to-digital converter input channel 0. 12 ADC1 Analog-to-digital converter input channel 1. 13 ADC2 Analog-to-digital converter input channel 2. 14 ADC3 Analog-to-digital converter input channel 3. 15 ADC4 Analog-to-digital converter input channel 4. 16 ADC5 Analog-to-digital converter input channel 5. 17 ADC6 Analog-to-digital converter input channel 6. 18 ADC7 Analog-to-digital converter input channel 7. 19 VREF Voltage reference input for ADC. 20 AVCC Analog power supply for ADC and other analog features. 21 AREF Analog reference input for ADC (if using an external reference). 22 RESET Reset input pin. Input logic high resets the microcontroller. 23 XTAL1 External crystal oscillator input pin for system clock. 24 XTAL2 External crystal oscillator output pin for system clock. 25 TOSC1 External clock input for the timer/counter oscillator. 26 TOSC2 External clock output for the timer/counter oscillator. 27 TDI Test data input for JTAG interface . 28 TDO Test data output for JTAG interface. 29 TMS Test mode select for JTAG interface. 30 TCK Test clock input for JTAG interface. 31 SCK Serial clock line for SPI communication. 32 MISO Master In Slave Out for SPI communication. 33 MOSI Master Out Slave In for SPI communication. 34 SS Slave Select for SPI communication. 35 PD0 I/O pin for PORTD. 36 PD1 I/O pin for PORTD. 37 PD2 I/O pin for PORTD. 38 PD3 I/O pin for PORTD. 39 PD4 I/O pin for PORTD. 40 PD5 I/O pin for PORTD. 41 PD6 I/O pin for PORTD. 42 PD7 I/O pin for PORTD. 43 PC0 I/O pin for PORTC. 44 PC1 I/O pin for PORTC. 45 PC2 I/O pin for PORTC. 46 PC3 I/O pin for PORTC. 47 PC4 I/O pin for PORTC. 48 PC5 I/O pin for PORTC. 49 PC6 I/O pin for PORTC. 50 PC7 I/O pin for PORTC.