2 ATmega 2561 700 740 180 140 580 540 64 (OC0B) PG5 (RXD0/PCINT8/PDI) PE0 (TXD0/PDO) PE1 (XCK0/AIN0) PE2 (OC3A/AIN1) PE3 (OC3B/INT4) PE4 (OC3C/INT5) PE5 (T3/INT6) PE6 (ICP3/CLKO/INT7) PE7 (SS/PCINT0) PB0 (SCK/PCINT1) PB1 (MOSI/PCINT2) PB2 (MISO/PCINT3) PB3 (OC2A/ PCINT4) PB4 (OC1A/PCINT5) PB5 (OC1B/PCINT6) PB6 (OC0A/OC1C/PCINT7) PB7 (TOSC2) PG3 (TOSC1) PG4 RESET VCC GND XTAL2 XTAL1 (SCL/INT0) PD0 (SDA/INT1) PD1 (RXD1/INT2) PD2 (TXD1/INT3) PD3 (ICP1) PD4 (XCK1) PD5 (T1) PD6 (T0) PD7 PG0 (WR) PG1 (RD) PC0 (A8) PC1 (A9) PC2 (A10) PC3 (A11) PC4 (A12) PC5 (A13) PC6 (A14) PC7 (A15) PG2 (ALE) PA7 (AD7) PA6 (AD6) PA5 (AD5) PA4 (AD4) PA3 (AD3) PA2 (AD2) PA1 (AD1) PA0 (AD0) VCC GND PF7 (ADC7/TDI) PF6 (ADC6/TDO) PF5 (ADC5/TMS) PF4 (ADC4/TCK) PF3 (ADC3) PF2 (ADC2) PF1 (ADC1) PF0 (ADC0) AREF GND AVCC
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