參數(shù)資料
型號(hào)： M37906M4H-XXXSP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁數(shù)： 41/99頁
文件大?。?/td> 1313K
代理商： M37906M4H-XXXSP
69
8168C-MCU Wireless-02/10
AT86RF212
Table 6-2. Frame Type Field
Frame Type Value
b2 b1 b0
Value
Description
000
0
Beacon
001
1
Data
010
2
Acknowledge
011
3
MAC command
100 – 111
4 – 7
Reserved
These bits are used for frame filtering by the third level filter rules, refer to section 6.2.
Bit 3 indicates whether security processing applies to this frame. This field is evaluated
by the Frame Filter.
Bit 4 is the “Frame Pending” subfield. This field can be set in an acknowledgment frame
to indicate to the node receiving the acknowledgment frame that the node sent the
acknowledgment frame has more data to send.
Bit 5 forms the “Acknowledgment Request” subfield. If this bit is set within a data or
MAC command frame that is not broadcast, the recipient shall acknowledge the
reception of the frame within the time specified by IEEE 802.15.4, i.e. within 12 symbols
for nonbeacon-enabled networks.
Bit 6, the “PAN ID Compression” subfield, indicates that in a frame where both the
destination and source addresses are present, the PAN ID is omitted from the source
addressing field. This bit is evaluated by the Frame Filter of the AT86RF212.
Bits [9:7] are reserved.
Bits [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 6-3 according to IEEE 802.15.4.
Table 6-3. Destination and Source Addressing Mode
Addressing Mode Value
b11 b10
Value
Description
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
If the destination address mode is either 2 or 3, i.e. if the destination address is present,
the addressing field consists of a 16-bit PAN ID first, followed by either the 16-bit or 64-
bit address as defined by the mode.
Bits [13:12]: The “Frame Version” subfield specifies the version number corresponding
to the frame, see Table 6-4. These bits are reserved in IEEE-802.15.4-2003.
This subfield shall be set to 0x00 to indicate a frame compatible with
IEEE 802.15.4-2003; it shall be set to 0x01 to indicate an IEEE 802.15.4-2006 frame.
All other subfield values shall be reserved for future use. See [2], section 7.2.3, for
details on frame compatibility.
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