ATmega644PR231 Atmel Corporation, ATmega644PR231 Datasheet - Page 82

• Manufacturer Part Number: ATmega644PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega644PR231

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• 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): 4
• Eeprom (bytes): 2048
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• 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

8111C–MCU Wireless–09/09
• Bit 6:
the "Intra-PAN" subfield indicates that in a frame, where both, the destination and source
addresses are present, the PAN-ID of the source address field is omitted. In RX_AACK mode,
this bit is evaluated by the address filter logic of the AT86RF231.
• Bit [11:10]:
the "Destination Addressing Mode" subfield describes the format of the destination address of
the frame. The values of the address modes are summarized in
to IEEE 802.15.4.
Table 8-3.
If the destination address mode is either 2 or 3 (i.e. if the destination address is present), it
always consists of a 16-bit PAN ID first, followed by either the 16-bit or 64-bit address as
described by the mode.
• Bit [13:12]:
the "Frame Version" subfield specifies the version number corresponding to the frame. These
register bits are reserved in IEEE 802.15.4-2003.
This subfield shall be set to 0 to indicate a frame compatible with IEEE 802.15.4-2003 and 1 to
indicate an IEEE 802.15.4-2006 frame. All other subfield values shall be reserved for future use.
RX_AACK register bit AACK_FVN_MODE (register 0x2E, CSMA_SEED_1) controls the behav-
ior of frame acknowledgements. This register determines if, depending on the Frame Version
Number, a frame is acknowledged or not. This is necessary for backward compatibility to IEEE
802.15.4-2003 and for future use. Even if frame version numbers 2 and 3 are reserved, it can be
handled by the radio transceiver, for details refer to
Registers” on page
See IEEE 802.15.4-2006, section 7.2.3 for details on frame compatibility.
Table 8-4.
Addressing Mode
Frame Version
Frame Control Field Bit Assignments
Frame Control Field Bit Assignments
b
b
b
11
15
13
00
01
10
11
00
01
10
11
b
b
b
10
14
12
Frame Control Field - Destination and Source Addressing Mode
Frame Control Field - Frame Version Subfield
68.
Value
Value
0
1
2
3
0
1
2
3
Description
PAN identifier and address fields are not present
Reserved
Address field contains a 16-bit short address
Address field contains a 64-bit extended address
Description
Frames are compatible with IEEE 802.15.4 2003
Frames are compatible with IEEE 802.15.4-2006
Reserved
Reserved
Section 7.2.7 “Register Description - Control
Table 8-3 on page
AT86RF231
82, according
82