ATmega1281 Atmel Corporation, ATmega1281 Datasheet - Page 353
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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Figure 30-11. Serial Programming Instruction example
30.8.4
2549N–AVR–05/11
Byte 1
Serial Programming Characteristics
Load Program Memory Page (High/Low Byte)/
Load EEPROM Memory Page (page access)
Bit 15 B
Byte 2
Adr M M S S B
A
Within the same page, the low data byte must be loaded prior to the high data byte.
After data is loaded to the page buffer, program the EEPROM page, see
For characteristics of the Serial Programming module, see
375.
Figure 30-12. Serial Programming Waveforms
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
Byte 3
SERIAL DATA INPUT
Adr LSB
Page Offset
SAMPLE
0
(MOSI)
(MISO)
(SCK)
Serial Programming Instruction
Byte 4
Program Memory/
EEPROM Memory
Page Buffer
MSB
MSB
Page N-1
Page 0
Page 1
Page 2
ATmega640/1280/1281/2560/2561
Byte 1
Page Number
Bit 15 B
Write Program Memory Page/
Write EEPROM Memory Page
Byte 2
Adr MSB
“SPI Timing Characteristics” on page
Byte 3
A A dr r L L SB B
Figure
0
30-11.
LSB
LSB
Byte 4
353
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