ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 292

• Manufacturer Part Number: ATmega1281R231
• 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

26.8.3
2549N–AVR–05/11
ADCSRA – ADC Control and Status Register A
Table 26-4.
Note:
• Bit 7 – ADEN: ADC Enable
Writing this bit to one enables the ADC. By writing it to zero, the ADC is turned off. Turning the
ADC off while a conversion is in progress, will terminate this conversion.
Bit
(0x7A)
Read/Write
Initial Value
101000
101001
101010
101011
101100
101101
101110
101111
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
MUX5:0
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
1. To reach the given accuracy, 10× or 200× Gain should not be used for operating voltage below
2.7V.
Input Channel Selections (Continued)
Reserved
Reserved
Single Ended
ADEN
R/W
7
0
Input
N/A
N/A
ADSC
R/W
6
0
ATmega640/1280/1281/2560/2561
ADC8
ADC9
ADC8
ADC9
ADC10
ADC11
ADC10
ADC11
ADC8
ADC9
ADC10
ADC11
ADC12
ADC13
ADC14
ADC15
ADC8
ADC9
ADC10
ADC11
ADC12
ADC13
ADATE
R/W
Positive Differential
5
0
Input
ADIF
R/W
4
0
ADIE
R/W
3
0
ADC8
ADC8
ADC8
ADC8
ADC10
ADC10
ADC10
ADC10
ADC9
ADC9
ADC9
ADC9
ADC9
ADC9
ADC9
ADC9
ADC10
ADC10
ADC10
ADC10
ADC10
ADC10
ADPS2
Negative Differential
R/W
N/A
N/A
2
0
Input
ADPS1
R/W
1
0
ADPS0
R/W
0
0
10×
10×
200×
200×
10×
10×
200×
200×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
ADCSRA
Gain
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