MRF24J40_08 Datasheet, PDF (109/152 Pages) Microchip Technology – IEEE 802.15.4™ 2.4 GHz RF Transceiver

MRF24J40
FIGURE 3-11:
PACKET TRANSMISSION
From
TX FIFO
TX FIFO
1
1
Header Frame
Length Length
(m) (m + n)
m
HHeeaaddeerr
n
DPatyaloPaadyload
PHY
Packet Structure
2
1
4 – 20
Data Frame
Format
Frame Sequence
Control ^Number
Addressing
Fields
MHR
2
1
4 – 20
MAC Command Frame
Format
Frame Sequence
Control ^Number
Addressing
Fields
MHR
2
1
4 – 10
Beacon Frame
Format
Frame Sequence
Control ^Number
Addressing
Fields
4
1
1
MHR
Preamble
SFD
Frame
Length
SHR
PHR
n
Data Payload
MSDU
1
n–1
Command
Type
Command Payload
2
Superframe
Specification
MSDU
k
m
GTS
Fields
Pending
Address
Fields
MSDU
8 – 127
n–m–k–2
Beacon Payload
PSDU
PHY Payload
octets
2
octets
FCS
MFR
2
octets
FCS
MFR
2
octets
FCS
MFR
octets
To
On Air
Air
Packet
PPDU
Fields appended
by TXMAC
Fields appended
by TX baseband
© 2008 Microchip Technology Inc.
Preliminary
DS39776B-page 107