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MRF24J40-I/T Datasheet(PDF) 6 Page - Microchip Technology

Part # MRF24J40-I/T
Description  IEEE 802.15.4??2.4 GHz RF Transceiver
PDF  156 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MRF24J40-I/T Datasheet(HTML) 6 Page - Microchip Technology

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MRF24J40
DS39776C-page 6
Preliminary
© 2010 Microchip Technology Inc.
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.
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.
FIGURE 1-2:
IEEE 802.15.4™ PHY PACKET AND MAC FRAME STRUCTURE
Preamble
SFD
41
Frame
Length
SHR
PHR
1
PHY Layer
2
1
4 or 10
Superframe
Specification
2
GTS
Fields
k
Pending
Address
Fields
m
Beacon Payload
n
MSDU
MFR
MAC Sublayer
Beacon
Frame
2
1
4 to 20
Data Payload
n
MSDU
MAC Sublayer
Data
Frame
2
1
4 to 20
Command Payload
n
MSDU
MAC Sublayer
MAC Command
Frame
Command
Type
1
PHY Payload
PSDU
MHR
MHR
MHR
Frame
Control
Adressing
Fields
Frame
Control
Adressing
Fields
Frame
Control
Adressing
Fields
Sequence
Number
Sequence
Number
Sequence
Number
PPDU
octets
5 – 127
FCS
2
MFR
FCS
2
MFR
FCS
2
octets
octets
octets
2
1
MAC Sublayer
Acknowledgment
Frame
MHR
Frame
Control
Sequence
Number
MFR
FCS
2
octets
On air
packet



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