MRF24XA_15 Datasheet, PDF (161/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
5.7 Security Procedure for IEEE
802.15.4 Compliant Frames
For more information about the frame format, refer to
Table 5-12 through Table 5-14 and Figure 5-3.
TABLE 5-11: RELEVANT REGISTER BITS FOR SECURITY CONTROL WITH IEEE 802.15.4™
FRAMES
Name
Bit 7
Bit 6
MACCON1 TRXMODE<1:0>
Legend: r = Reserved, read as ‘0’.
Bit 5
Bit 4
Bit 3
ADDRSZ<2:0>
Bit 2
Bit 1
Bit 0
CRCSZ FRMFMT SECFLAGOVR
TABLE 5-12:
Security
Support
Category
0
A
B
C
D
E
DEFINITION OF SECURITY SUPPORT CATEGORIES (IEEE 802.15.4™ FRAMES)
SecEn
FrameVer
<1:0>
Type<2:0> (and
SAMode)
Description
0
0x
Data/CMD/Beacon/ACK
No security
1
0x
Data/CMD
2003/2006 MAC layer security
1
0x
Beacon
2003/2006 MAC layer secured beacon
0
0x
Data/(CMD)/Beacon
NWK layer security
1
0x
Data/CMD
NWK + 2003/2006 MAC layer security
1
0x
Beacon
NWK + 2003/2006 MAC layer security for
Beacon frames
 2015 Microchip Technology Inc.
Preliminary
DS70005023C-page 161