ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 231
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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Table 22-12. Examples of UBRRn Settings for Commonly Used Oscillator Frequencies
2549N–AVR–05/11
Max.
115.2K
230.4K
14.4K
19.2K
28.8K
38.4K
57.6K
76.8K
Baud
(bps)
250K
Rate
2400
4800
9600
0.5M
1M
(1)
UBRR
416
207
103
68
51
34
25
16
12
8
3
3
1
0
U2Xn = 0
1Mbps
f
osc
-0.1%
-3.5%
-0.8%
Error
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.2%
8.5%
0.0%
0.0%
0.0%
= 16.0000MHz
Note:
UBRR
832
416
207
138
103
68
51
34
25
16
8
7
3
1
U2Xn = 1
1. UBRR = 0, Error = 0.0%
2Mbps
-0.1%
-0.1%
-0.8%
-3.5%
Error
0.0%
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.0%
0.0%
0.0%
UBRR
479
239
119
79
59
39
29
19
14
9
4
4
–
–
1.152Mbps
U2Xn = 0
f
osc
ATmega640/1280/1281/2560/2561
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
= 18.4320MHz
UBRR
959
479
239
159
119
79
59
39
29
19
9
8
4
–
2.304Mbps
U2Xn = 1
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
2.4%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
UBRR
520
259
129
86
64
42
32
21
15
10
4
4
–
–
1.25Mbps
U2Xn = 0
f
osc
-0.2%
-1.4%
-1.4%
-1.4%
Error
0.0%
0.2%
0.2%
0.2%
0.9%
1.7%
8.5%
0.0%
–
–
= 20.0000MHz
UBRR
1041
520
259
173
129
86
64
42
32
21
10
9
4
–
U2Xn = 1
2.5Mbps
-0.2%
-0.2%
-1.4%
-1.4%
-1.4%
Error
0.0%
0.0%
0.2%
0.2%
0.2%
0.9%
0.0%
0.0%
–
231
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