ATmega1281 Atmel Corporation, ATmega1281 Datasheet - Page 445
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
29 Boot Loader Support – Read-While-Write Self-Programming ......... 317
30 Memory Programming ......................................................................... 335
31 Electrical Characteristics .................................................................... 367
32 Typical Characteristics ........................................................................ 385
28.3
28.4
28.5
28.6
28.7
28.8
29.1
29.2
29.3
29.4
29.5
29.6
29.7
30.1
30.2
30.3
30.4
30.5
30.6
30.7
30.8
30.9
31.1
31.2
31.3
31.4
31.5
31.6
31.7
31.8
31.9
Data Registers ...............................................................................................302
Boundary-scan Specific JTAG Instructions ...................................................304
Boundary-scan Chain ....................................................................................305
Boundary-scan Related Register in I/O Memory ...........................................308
ATmega640/1280/1281/2560/2561 Boundary-scan Order ............................308
Boundary-scan Description Language Files ..................................................308
Features ........................................................................................................317
Application and Boot Loader Flash Sections .................................................317
Read-While-Write and No Read-While-Write Flash Sections ........................317
Boot Loader Lock Bits ...................................................................................320
Addressing the Flash During Self-Programming ...........................................322
Self-Programming the Flash ..........................................................................323
Register Description ......................................................................................332
Program And Data Memory Lock Bits ...........................................................335
Fuse Bits ........................................................................................................336
Signature Bytes .............................................................................................338
Calibration Byte .............................................................................................338
Page Size ......................................................................................................338
Parallel Programming Parameters, Pin Mapping, and Commands ...............338
Parallel Programming ....................................................................................341
Serial Downloading ........................................................................................349
Programming via the JTAG Interface ............................................................354
DC Characteristics .........................................................................................367
Speed Grades ...............................................................................................369
Clock Characteristics .....................................................................................371
External Clock Drive ......................................................................................371
System and Reset Characteristics ................................................................372
2-wire Serial Interface Characteristics ...........................................................373
SPI Timing Characteristics ............................................................................375
ADC Characteristics – Preliminary Data ........................................................377
External Data Memory Timing .......................................................................379
ATmega640/1280/1281/2560/2561
vi
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