ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 441
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ATmega1281R231
Manufacturer Part Number
ATmega1281R231
Description
Manufacturer
Atmel Corporation
Specifications of ATmega1281R231
Flash (kbytes)
128 Kbytes
Max. Operating Frequency
16 MHz
Max I/o Pins
54
Spi
3
Twi (i2c)
1
Uart
2
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Crypto Engine
AES
Sram (kbytes)
8
Eeprom (bytes)
4096
Operating Voltage (vcc)
1.8 to 3.6
Timers
6
Frequency Band
2.4 GHz
Max Data Rate (mb/s)
2
Antenna Diversity
Yes
External Pa Control
Yes
Power Output (dbm)
3
Receiver Sensitivity (dbm)
-101
Receive Current Consumption (ma)
13.2
Transmit Current Consumption (ma)
14.4
Link Budget (dbm)
104
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2549N–AVR–05/11
11 Power Management and Sleep Modes ................................................. 52
12 System Control and Reset .................................................................... 59
13 I/O-Ports .................................................................................................. 70
14 Interrupts .............................................................................................. 105
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
10.12
10.13
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
12.1
12.2
12.3
12.4
12.5
13.1
13.2
13.3
13.4
Clock Systems and their Distribution ...............................................................40
Clock Sources .................................................................................................41
Low Power Crystal Oscillator ...........................................................................42
Full Swing Crystal Oscillator ............................................................................44
Low Frequency Crystal Oscillator ....................................................................45
Calibrated Internal RC Oscillator .....................................................................46
128 kHz Internal Oscillator ..............................................................................47
External Clock .................................................................................................48
Clock Output Buffer .........................................................................................49
Timer/Counter Oscillator ..................................................................................49
System Clock Prescaler ..................................................................................49
Register Description ........................................................................................50
Sleep Modes ....................................................................................................52
Idle Mode .........................................................................................................52
ADC Noise Reduction Mode ............................................................................53
Power-down Mode ...........................................................................................53
Power-save Mode ............................................................................................53
Standby Mode .................................................................................................54
Extended Standby Mode .................................................................................54
Power Reduction Register ...............................................................................54
Minimizing Power Consumption ......................................................................54
Register Description ........................................................................................56
Resetting the AVR ...........................................................................................59
Reset Sources .................................................................................................59
Internal Voltage Reference ..............................................................................62
Watchdog Timer ..............................................................................................63
Register Description ........................................................................................67
Introduction ......................................................................................................70
Ports as General Digital I/O .............................................................................71
Alternate Port Functions ..................................................................................75
Register Description for I/O-Ports ..................................................................100
ATmega640/1280/1281/2560/2561
ii
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