MCU: ATmega1280
Package: 100 pin TQFP

 1: PG5 OC0B
 2: PE0 RXD0 PCINT8
 3: PE1 TXD0
 4: PE2 XCK0 AIN0
 5: PE3 OC3A
 6: PE4 OC3B INT4
 7: PE5 OC3C INT5
 8: PE6 T3 INT6
 9: PE7 CLKO ICP3 INT7
10: Vcc
11: Gnd
12: PH0 RXD2
13: PH1 TXD2
14: PH2 XCk2
15: PH3 OC4A
16: PH4 OC4B
17: PH5 OC4C
18: PH6 OC2B
19: PB0 /SS PCINT0
20: PB1 SCK PCINT1
21: PB2 MOSI PCINT2
22: PB3 MISO PCINT3
23: PB4 OC2A PCINT4
24: PB5 OC1A PCINT5
25: PB6 OC1B PCINT6
26: PB7 OC0A OC1C PCINT7
27: PH7 T4
28: PG3 TOSC2
29: PG4 TOSC1
30: Reset
31: Vcc
32: Gnd
33: XTAL2
34: XTAL1
35: PL0 ICP4
36: PL1 ICP5
37: PL2 T5
38: PL3 OC5A
39: PL4 OC5B
40: PL5 OC5C
41: PL6
42: PL7
43: PD0 SCL INT0
44: PD1 SDA INT1
45: PD2 RXD1 INT2
46: PD3 TXD1 INT3
47: PD4 ICP1
48: PD5 XCK1
49: PD6 T1
50: PD7 T0
51: PG0 WR
52: PG1 RD
53: PC0 A8
54: PC1 A9
55: PC2 A10
56: PC3 A11
57: PC4 A12
58: PC5 A13
59: PC6 A14
60: PC7 A15
61: Vcc
62: Gnd
63: PJ0 RXD3 PCINT9
64: PJ1 TXD3 PCINT10
65: PJ2 XCK3 PCINT11
66: PJ3 PCINT12
67: PJ4 PCINT13
68: PJ5 PCINT14
69: PJ6 PCINT15
70: PG2 ALE
71: PA7 AD7
72: PA6 AD6
73: PA5 AD5
74: PA4 AD4
75: PA3 AD3
76: PA2 AD2
77: PA1 AD1
78: PA0 AD0
79: PJ7
80: Vcc
81: Gnd
82: PK7 ADC15 PCINT23
83: PK6 ADC14 PCINT22
84: PK5 ADC13 PCINT21
85: PK4 ADC12 PCINT20
86: PK3 ADC11 PCINT19
87: PK2 ADC10 PCINT18
88: PK1 ADC9 PCINT17
89: PK0 ADC8 PCINT16
90: PF7 ADC7 TDI
91: PF6 ADC6 TDO
92: PF5 ADC5 TMS
93: PF4 ADC4 TCK
94: PF3 ADC3
95: PF2 ADC2
96: PF1 ADC1
97: PF0 ADC0
98: AREF
99: Gnd
100: AVCC

Summary:
 
• High Performance, Low Power Atmel AVR 8-Bit Microcontroller
• Advanced RISC Architecture
– 135 Powerful Instructions – Most Single Clock Cycle Execution
– 32 * 8 General Purpose Working Registers
– Fully Static Operation
– Up to 16 MIPS Throughput at 16MHz
– On-Chip 2-cycle Multiplier
• High Endurance Non-volatile Memory Segments
– 128 KBytes of In-System Self-Programmable Flash 
– 4 Kbytes EEPROM
– 8 Kbytes Internal SRAM
– Write/Erase Cycles:10,000 Flash/100,000 EEPROM
– Data retention: 20 years at 85 C/ 100 years at 25 C
– Optional Boot Code Section with Independent Lock Bits
• In-System Programming by On-chip Boot Program
• True Read-While-Write Operation
– Programming Lock for Software Security
• Endurance: Up to 64Kbytes Optional External Memory Space
• Atmel QTouch library support
– Capacitive touch buttons, sliders and wheels
– QTouch and QMatrix acquisition
– Up to 64 sense channels
• JTAG (IEEE std. 1149.1 compliant) Interface
– Boundary-scan Capabilities 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
– 16 PWM Channels with Programmable Resolution from 2 to 16 Bits
– Output Compare Modulator
– 16-channel, 10-bit ADC
– Four Programmable Serial USART
– 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
– 86 Programmable I/O Lines 
– 100-lead TQFP, 100-ball CBGA 
– RoHS/Fully Green
• Temperature Range:
– -40?C to 85?C Industrial
• Ultra-Low Power Consumption
– Active Mode: 1MHz, 1.8V: 500µA
– Power-down Mode: 0.1µA at 1.8V
• Speed Grade:
– ATmega640V/ATmega1280V/ATmega1281V:
• 0 - 4MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V
– ATmega2560V/ATmega2561V:
• 0 - 2MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V
– ATmega640/ATmega1280/ATmega1281:
• 0 - 8MHz @ 2.7V - 5.5V, 0 - 16MHz @ 4.5V - 5.5V
– ATmega2560/ATmega2561:
• 0 - 16MHz @ 4.5V - 5.5V
