70
8168C-MCU Wireless-02/10
AT86RF212
Table 6-4. Frame Version Field
Frame Version Value
b13 b12
Value
Description
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
Bits [15:14] form the “Source Addressing Mode” subfield, with similar meaning as
“Destination Addressing Mode”.
The addressing field description bits of the FCF (Bits 0...2, 3, 6, 10…15) affect the
AT86RF212 Frame Filter, see section
6.2.6.1.2.3 Frame Compatibility between IEEE 802.15.4 Rev. 2003 and 2006
All unsecured frames according to IEEE 802.15.4-2006 are compatible with unsecured
frames compliant with IEEE 802.15.4-2003, with two exceptions: a coordinator
realignment command frame with the Channel Page field present (see [2], section
7.3.8) and any frame with a MAC Payload field larger than aMaxMACSafePayloadSize
octets.
Compatibility for secured frames is shown in
Table 6-5, which identifies the security
operating modes for IEEE 802.15.4-2003 and IEEE 802.15.4-2006.
Table 6-5. Frame Compatibility
Frame Control Field Bit Assignments
Security Enabled
b3
Frame Version
b13 b12
Description
0
00
No security. Frames are compatible between
IEEE 802.15.4-2003 and IEEE 802.15.4-2006.
0
01
No security. Frames are not compatible between
IEEE 802.15.4-2003 and IEEE 802.15.4-2006.
1
00
Secured frame formatted according to
IEEE 802.15.4-2003. This type of frame is not
supported in IEEE 802.15.4-2006.
1
01
Secured frame formatted according to
IEEE 802.15.4-2006
6.1.2.4 Sequence Number
The one-octet sequence number following the FCF identifies a particular frame, so that
duplicated frame transmissions can be detected. While operating in RX_AACK states,
the received frame content of this field is copied into the acknowledgment frame.
6.1.2.5 Addressing Fields
The addressing field carries several addresses used for address matching indication.
The destination address (if present) is always first, followed by the source address (if
present). Each address field consists of the PAN ID and a device address. If both
addresses are present and the “PAN ID compression” subfield in the FCF is set to one,
the source PAN ID is omitted.