MRF24J40
It is highly recommended that the design engineer be
familiar with the IEEE 802.15.4-2003 Standard in order
to best understand the configuration and operation of the
MRF24J40. The Standard can be downloaded from the
IEEE web site: http://www.ieee.org.
1.1
IEEE 802.15.4-2003 Standard
The
MRF24J40
is
compliant
with
the
IEEE 802.15.4™-2003 Standard. The Standard speci-
fies the physical (PHY) and Media Access Controller
(MAC) functions that form the basis for a wireless net-
work device. Figure 1-2 shows the structure of the PHY
packet and MAC frame.
FIGURE 1-2:
IEEE 802.15.4™ PHY PACKET AND MAC FRAME STRUCTURE
2
1
2
octets
Acknowledgment
Frame
Frame
Control
Sequence
Number
MAC Sublayer
FCS
MFR
MHR
2
1
4 to 20
n
2
octets
octets
octets
octets
Data
Frame
Frame
Control
Adressing
Fields
Sequence
Number
MAC Sublayer
MAC Sublayer
MAC Sublayer
PHY Layer
Data Payload
MSDU
FCS
MFR
MHR
2
1
4 to 20
1
n
2
MAC Command
Frame
Frame
Control
Adressing
Fields
Command
Type
Sequence
Number
Command Payload
MSDU
FCS
MFR
MHR
2
1
4 or 10
2
k
m
n
2
Pending
Address
Fields
Beacon
Frame
Frame
Control
Adressing
Fields
GTS
Fields
Sequence
Number
Superframe
Specification
Beacon Payload
FCS
MFR
MHR
MSDU
4
1
1
5 – 127
PSDU
Frame
Length
Preamble
SFD
SHR
PHR
PHY Payload
On air
packet
PPDU
DS39776C-page 6
Preliminary
© 2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
