ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 228

• 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

Table 22-9.
2549N–AVR–05/11
Max.
115.2K
230.4K
57.6K
76.8K
Baud
(bps)
250K
Rate
(1)
UBRR
0
–
–
–
–
Examples of UBRRn Settings for Commonly Used Oscillator Frequencies (Continued)
U2Xn = 0
62.5Kbps
f
osc
Error
8.5%
–
–
–
–
= 1.0000MHz
Note:
UBRR
1
1
0
–
–
U2Xn = 1
125Kbps
1. UBRR = 0, Error = 0.0%
-18.6%
Error
8.5%
8.5%
–
–
UBRR
1
1
0
–
–
115.2Kbps
U2Xn = 0
f
-25.0%
ATmega640/1280/1281/2560/2561
osc
Error
0.0%
0.0%
–
–
= 1.8432MHz
UBRR
1
3
2
0
–
230.4Kbps
U2Xn = 1
Error
0.0%
0.0%
0.0%
0.0%
–
UBRR
1
1
0
–
–
U2Xn = 0
125Kbps
f
-18.6%
osc
Error
8.5%
8.5%
–
–
= 2.0000MHz
UBRR
3
2
1
–
0
U2Xn = 1
250Kbps
Error
8.5%
8.5%
8.5%
0.0%
–
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