ATmega1281 Atmel Corporation, ATmega1281 Datasheet - Page 2

• Manufacturer Part Number: ATmega1281
• Manufacturer: Atmel Corporation

Specifications of ATmega1281

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 17
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 16
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

1. Pin Configurations
Figure 1-1.
2549NS–AVR–05/11
(CLKO/ICP3/INT7) PE7
(OC2A/PCINT4) PB4
(OC1A/PCINT5) PB5
(OC1B/PCINT6) PB6
(RXD0/PCINT8) PE0
(MOSI/PCINT2) PB2
(MISO/PCINT3) PB3
(SCK/PCINT1) PB1
(OC3A/AIN1) PE3
(OC3B/INT4) PE4
(OC3C/INT5) PE5
(SS/PCINT0) PB0
(XCK0/AIN0) PE2
(T3/INT6) PE6
(OC0B) PG5
(OC4A) PH3
(OC4B) PH4
(OC4C) PH5
(OC2B) PH6
(RXD2) PH0
(TXD2) PH1
(XCK2) PH2
(TXD0) PE1
GND
VCC
TQFP-pinout ATmega640/1280/2560
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
2
3
4
5
6
7
8
9
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
26
27
28 29
INDEX CORNER
30
31
32
33 34
35
36
37
ATmega640/1280/1281/2560/2561
38 39 40 41 42 43 44 45 46 47 48 49 50
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
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)
2