User Manual
82
8111A–AVR–05/08
AT86RF231
•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 Table 8-3 on page 82, according
to IEEE 802.15.4.
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 Section 7.2.7 “Register Description - Control
Registers” on page 68.
See IEEE 802.15.4-2006, section 7.2.3 for details on frame compatibility.
Table 8-3. Frame Control Field - Destination and Source Addressing Mode
Frame Control Field Bit Assignments Description
Addressing Mode
b
11
b
10
b
15
b
14
Value
00 0 PAN identifier and address fields are not present
01 1 Reserved
10 2 Address field contains a 16-bit short address
11 3 Address field contains a 64-bit extended address
Table 8-4. Frame Control Field - Frame Version Subfield
Frame Control Field Bit Assignments Description
Frame Version
b
13
b
12
Value
00 0 Frames are compatible with IEEE 802.15.4 2003
01 1 Frames are compatible with IEEE 802.15.4-2006
10 2 Reserved
11 3 Reserved