ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 381

• 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 31-15. External Data Memory Characteristics, 2.7 to 5.5 Volts, No Wait-state (Continued)
Notes:
Table 31-16. External Data Memory Characteristics, 2.7 to 5.5 Volts, SRWn1 = 0, SRWn0 = 1
2549N–AVR–05/11
1
2
3a
3b
4
5
6
7
8
9
10
11
12
13
14
15
16
0
10
12
15
16
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Symbol
1/t
t
t
t
t
LHLL
AVLL
LLAX_ST
LLAX_LD
AVLLC
AVRL
AVWL
LLWL
LLRL
DVRH
RLDV
RHDX
RLRH
DVWL
WHDX
DVWH
WLWH
RLDV
RLRH
DVWH
WLWH
1. This assumes 50% clock duty cycle. The half period is actually the high time of the external clock, XTAL1.
2. This assumes 50% clock duty cycle. The half period is actually the low time of the external clock, XTAL1.
CLCL
Parameter
ALE Pulse Width
Address Valid A to ALE Low
Address Hold After ALE Low,
write access
Address Hold after ALE Low,
read access
Address Valid C to ALE Low
Address Valid to RD Low
Address Valid to WR Low
ALE Low to WR Low
ALE Low to RD Low
Data Setup to RD High
Read Low to Data Valid
Data Hold After RD High
RD Pulse Width
Data Setup to WR Low
Data Hold After WR High
Data Valid to WR High
WR Pulse Width
Parameter
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Valid to WR High
WR Pulse Width
Min
235
115
115
235
235
115
115
235
105
235
250
235
Min
485
500
485
45
5
5
0
4MHz Oscillator
4MHz Oscillator
ATmega640/1280/1281/2560/2561
Max
Max
130
130
190
440
0.5t
0.5t
0.5t
0.5t
0.5t
1.0t
1.0t
1.0t
1.0t
1.0t
2.0t
2.0t
t
1.0t
2.0t
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
Min
Min
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
0.0
45
5
5
0
Variable Oscillator
Variable Oscillator
CLCL
CLCL
-15
-10
-10
-10
-10
-20
-15
-15
-15
-15
-15
-15
-15
(1)
(1)
(2)
(2)
(1)
0.5t
0.5t
1.0t
2.0t
CLCL
CLCL
Max
Max
CLCL
CLCL
8
+5
+5
-60
-60
(2)
(2)
Unit
Unit
MHz
ns
ns
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