ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 338

• 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

30.2.1
30.3
30.4
30.5
30.6
2549N–AVR–05/11
Signature Bytes
Calibration Byte
Page Size
Parallel Programming Parameters, Pin Mapping, and Commands
Latching of Fuses
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and parallel mode, also when the device is locked. The three
bytes reside in a separate address space. For the ATmega640/1280/1281/2560/2561 the signa-
ture bytes are given in
Table 30-6.
The ATmega640/1280/1281/2560/2561 has a byte calibration value for the internal RC Oscilla-
tor. This byte resides in the high byte of address 0x000 in the signature address space. During
reset, this byte is automatically written into the OSCCAL Register to ensure correct frequency of
the calibrated RC Oscillator.
Table 30-7.
Table 30-8.
This section describes how to parallel program and verify Flash Program memory, EEPROM
Data memory, Memory Lock bits, and Fuse bits in the ATmega640/1280/1281/2560/2561.
Pulses are assumed to be at least 250ns unless otherwise noted.
Part
ATmega640
ATmega1280
ATmega1281
ATmega2560
ATmega2561
128K words (256Kbytes)
EEPROM Size
Flash Size
4Kbytes
Device and JTAG ID
No. of Words in a Page and No. of Pages in the Flash
No. of Words in a Page and No. of Pages in the EEPROM
0x000
Table
0x1E
0x1E
0x1E
0x1E
0x1E
Signature Bytes Address
30-6.
Page Size
Page Size
128 words
8 bytes
ATmega640/1280/1281/2560/2561
0x001
0x96
0x97
0x97
0x98
0x98
PCWORD
PCWORD
EEA[2:0]
PC[6:0]
0x002
0x08
0x03
0x04
0x01
0x02
Part Number
Pages
Pages
No. of
No. of
1024
512
9608
9703
9704
9801
9802
EEA[11:3]
PCPAGE
PCPAGE
PC[16:7]
JTAG
Manufacture ID
0x1F
0x1F
0x1F
0x1F
0x1F
EEAMSB
PCMSB
16
11
338