ATmega1281 Atmel Corporation, ATmega1281 Datasheet - Page 404

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ATmega1281

Manufacturer Part Number
ATmega1281
Description
Manufacturer
Atmel Corporation
Datasheets

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

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32.10 Internal Oscillator Speed
2549N–AVR–05/11
Figure 32-35. Watchdog Oscillator Frequency vs. V
Figure 32-36. Watchdog Oscillator Frequency vs. Temperature
128
126
124
122
120
118
116
114
128
126
124
122
120
118
116
114
-60
2
-40
2.5
-20
ATmega640/1280/1281/2560/2561
3
0
3.5
Temperature (°C)
V
CC
20
(V)
CC
4
40
4.5
60
5
80
2.1V
2.7V
3.3V
4.0V
5.5V
100
5.5
-40°C
25°C
85°C
404

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