MRF24XA_15 Datasheet, PDF (170/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
TABLE 6-1:
Frame Type
Streaming
FRAME TYPES (BOTH PROTOCOLS) (CONTINUED)
IEEE
Mi-Wi
Description
N/A
00
TRXMODE= 01 by transmitter
TRXMODE= 10 by receiver
The two buffers are handled by alternating between the two to service
a single direction.
Security parsing makes no distinction between Streaming frames and
Data frames.
Streaming frames are never acknowledged.
FIGURE 6-2:
PROPRIETARY MAC HEADER STRUCTURE: ACKNOWLEDGE FRAME
Acknowledge Frame (Proprietary)
MHR
Length
(1 octet)
FrameCtrl
(1 octet)
Sequence
(1 octet)
FCS
(2 octets)
7
SAddrPrsnt
(1 bit)
0
6
DAddrPrsnt
(1 bit)
0
1 byte of FrameCtrl (Proprietary) = 0x06
5
4
3
AckReq
(1 bit)
0
Repeat
(1 bit)
0
SecEn
(1 bit)
0
6.3 Addressing in Proprietary
Framing Mode
The following fields are handled using these examples:
• Header
• Sequence number
• Address
• Data/Command
• CRC
• Inferred Destination Addressing: The Destination
Address participates in the CRC computation as
part of the frame, but it is omitted from the frame
that is sent into the air.
2
Broadcast
(1 bit)
1
1:0
Type
(2 bits)
10
DS70005023B-page 170
Preliminary
 2015 Microchip Technology Inc.