Atmega1280

Features
• High Performance, Low Power AVR® 8-Bit Microcontroller • Advanced RISC Architecture
– 135 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers – Fully Static Operation – Up to 16 MIPS Throughput at 16 MHz – On-Chip 2-cycle Multiplier Non-volatile Program and Data Memories – 64K/128K/256K Bytes of In-System Self-Programmable FlashEndurance: 10,000 Write/Erase Cycles – Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation – 4K Bytes EEPROM Endurance: 100,000 Write/Erase Cycles – 8K Bytes Internal SRAM – Up to 64K Bytes Optional External Memory Space – Programming Lock for Software Security JTAG (IEEE std. 1149.1 compliant) Interface – Boundary-scanCapabilities According to the JTAG Standard – Extensive On-chip Debug Support – Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface Peripheral Features – Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode – Four 16-bit Timer/Counter with Separate Prescaler, Compare- and Capture Mode – Real Time Counter with Separate Oscillator – Four 8-bit PWM Channels –Six/Twelve PWM Channels with Programmable Resolution from 2 to 16 Bits (ATmega1281/2561, ATmega640/1280/2560) – Output Compare Modulator – 8/16-channel, 10-bit ADC – Two/Four Programmable Serial USART (ATmega1281/2561,ATmega640/1280/2560) – Master/Slave SPI Serial Interface – Byte Oriented 2-wire Serial Interface – Programmable Watchdog Timer with Separate On-chip Oscillator – On-chip Analog Comparator– Interrupt and Wake-up on Pin Change Special Microcontroller Features – Power-on Reset and Programmable Brown-out Detection – Internal Calibrated Oscillator – External and Internal Interrupt Sources – Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby I/O and Packages – 51/86 Programmable I/O Lines (ATmega1281/2561, ATmega640/1280/2560) – 64-lead(ATmega1281/2561) – 100-lead (ATmega640/1280/2560) – 100-lead TQFP (64-lead TQFP Option) Temperature Range: – -40°C to 85°C Industrial Speed Grade: – ATmega1281/2561V/ATmega640/1280/2560V: 0 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V – ATmega640/1280/1281/2560/2561: 0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V

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8-bit Microcontroller with 256K Bytes In-System Programmable FlashATmega1281/25 61/V ATmega640/128 0/2560/V Advance Information

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2549A–AVR–03/05

Pin Configurations

Figure 1. Pinout ATmega640/1280/2560
PK6 (ADC14/PCINT22) PK7 (ADC15/PCINT23) PK3 (ADC11/PCINT19) PK2 (ADC10/PCINT18) PK4 (ADC12/PCINT20) PK5 (ADC13/PCINT21) PK0 (ADC8/PCINT16) PF5 (ADC5/TMS) PF6 (ADC6/TDO) PF4 (ADC4/TCK) PF7 (ADC7/TDI) PK1 (ADC9/PCINT17)

PF1 (ADC1)

PF2(ADC2)

PF0 (ADC0)

PF3 (ADC3)

PA0 (AD0)

PA1 (AD1)
77

100 99 (OC0B) PG5 (RXD0/PCINT8) PE0 (TXD0) PE1 (XCK0/AIN0) PE2 (OC3A/AIN1) PE3 (OC3B/INT4) PE4 (OC3C/INT5) PE5 (T3/INT6) PE6 (CLKO/ICP3/INT7) PE7 VCC GND (RXD2) PH0 (TXD2) PH1 (XCK2) PH2 (OC4A) PH3 (OC4B) PH4 (OC4C) PH5 (OC2B) PH6 (SS/PCINT0) PB0 (SCK/PCINT1) PB1 (MOSI/PCINT2) PB2 (MISO/PCINT3) PB3 (OC2A/PCINT4) PB4 (OC1A/PCINT5)PB5 (OC1B/PCINT6) PB6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

98

97

96

95

94

93

92

91

90

89

88

87

86

85

84

83

82

81

80

79

78

PA2 (AD2)
76 75 74 PA3 (AD3) PA4 (AD4) PA5 (AD5) PA6 (AD6) PA7 (AD7) PG2 (ALE) PJ6 (PCINT15) PJ5 (PCINT14) PJ4 (PCINT13) PJ3 (PCINT12) PJ2 (XCK3/PCINT11) PJ1 (TXD3/PCINT10) PJ0(RXD3/PCINT9) GND VCC PC7 (A15) PC6 (A14) PC5 (A13) PC4 (A12) PC3 (A11) PC2 (A10) PC1 (A9) PC0 (A8) PG1 (RD) PG0 (WR) 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50

AVCC

AREF

GND

GND

VCC
46

INDEX CORNER

ATmega640/1280/2560

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

PJ7
47

48...