ATmega1281 Atmel Corporation, ATmega1281 Datasheet - Page 442
ATmega1281
Manufacturer Part Number
ATmega1281
Description
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATmega1281-8MC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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2549N–AVR–05/11
15 External Interrupts ............................................................................... 112
16 8-bit Timer/Counter0 with PWM .......................................................... 118
17 16-bit Timer/Counter (Timer/Counter 1, 3, 4, and 5) .......................... 136
18 Timer/Counter 0, 1, 3, 4, and 5 Prescaler ........................................... 169
14.1
14.2
14.3
14.4
15.1
15.2
16.1
16.2
16.3
16.4
16.5
16.6
16.7
16.8
16.9
17.1
17.2
17.3
17.4
17.5
17.6
17.7
17.8
17.9
17.10
17.11
18.1
18.2
18.3
18.4
Interrupt Vectors in ATmega640/1280/1281/2560/2561 ................................105
Reset and Interrupt Vector placement ...........................................................107
Moving Interrupts Between Application and Boot Section .............................109
Register Description ......................................................................................110
Pin Change Interrupt Timing ..........................................................................112
Register Description ......................................................................................113
Features ........................................................................................................118
Overview ........................................................................................................118
Timer/Counter Clock Sources .......................................................................119
Counter Unit ..................................................................................................119
Output Compare Unit .....................................................................................120
Compare Match Output Unit ..........................................................................122
Modes of Operation .......................................................................................123
Timer/Counter Timing Diagrams ...................................................................127
Register Description ......................................................................................129
Features ........................................................................................................136
Overview ........................................................................................................136
Accessing 16-bit Registers ............................................................................138
Timer/Counter Clock Sources .......................................................................141
Counter Unit ..................................................................................................142
Input Capture Unit .........................................................................................143
Output Compare Units ...................................................................................145
Compare Match Output Unit ..........................................................................147
Modes of Operation .......................................................................................148
Timer/Counter Timing Diagrams ...................................................................156
Register Description ......................................................................................158
Internal Clock Source ....................................................................................169
Prescaler Reset .............................................................................................169
External Clock Source ...................................................................................169
Register Description ......................................................................................170
ATmega640/1280/1281/2560/2561
iii
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