ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 382
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 31-17. External Data Memory Characteristics, 2.7 to 5.5 Volts, SRWn1 = 1, SRWn0 = 0
Table 31-18. External Data Memory Characteristics, 2.7 to 5.5 Volts, SRWn1 = 1, SRWn0 = 1
2549N–AVR–05/11
0
10
12
15
16
0
10
12
14
15
16
Symbol
1/t
t
t
t
t
Symbol
1/t
t
t
t
t
t
RLDV
RLRH
DVWH
WLWH
RLDV
RLRH
WHDX
DVWH
WLWH
CLCL
CLCL
Parameter
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Valid to WR High
WR Pulse Width
Parameter
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Hold After WR High
Data Valid to WR High
WR Pulse Width
Figure 31-9. External Memory Timing (SRWn1 = 0, SRWn0 = 0
System Clock (CLK
DA7:0 (XMBK = 0)
DA7:0
A15:8
CPU
ALE
WR
RD
)
Prev. addr.
Prev. data
Min
735
750
735
Min
735
485
750
735
4MHz Oscillator
4MHz Oscillator
ATmega640/1280/1281/2560/2561
T1
1
Address
Address
4
2
Max
Max
690
690
5
T2
6
3a
3b
XX
7
8
13
10
3.0t
3.0t
3.0t
2.0t
3.0t
Address
3.0t
3.0t
T3
15
Min
Min
CLCL
CLCL
CLCL
CLCL
CLCL
0.0
0.0
12
Data
Data
16
Variable Oscillator
Variable Oscillator
CLCL
CLCL
9
-15
-15
-15
-15
-15
11
3.0t
3.0t
T4
14
Max
Max
CLCL
CLCL
8
8
-60
-60
MHz
MHz
Unit
Unit
ns
ns
382
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