MRF24XA_15 Datasheet, PDF (42/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
REGISTER 2-23: RXFILTER (RX FILTER REGISTER)
R/W-0
R/W-1
R/W-1
R/W-1
R/W-1
PANCRDN
bit 7
CRCREJ
CMDREJ
DATAREJ
UNIREJ
R/W-1
NOTMEREJ
ADDRESS: 0x18
R/W-1
R/W-1
BCREJ
NSTDREJ
bit 0
Legend: R = Readable bit W = Writable bit
-n = Value at POR
‘1’ = Bit is set
r = Reserved
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
PANCRDN: PAN Coordinator bit
Setting this bit enables the node to accept DAMode = 00 type packets if it is a CMD or DATA frame.
1 = Disable rejection
0 = Reject all DATA and CMD packets when DAMode = 00
bit 6
CRCREJ: CRC Error Reject Enable bit⁽¹⁾
Setting this bit enables the user to reject all packets that contains an invalid CRC, provided that it is
present (CRCSZ = 1). Clearing this bit enables the user to accept all packets that contains an invalid
CRC, provided that it is present (CRCSZ = 1), skipping any further filtering. When CRC is not present
then this bit has no effect (CRCSZ = 0).
1 = Reject all packets having an invalid CRC
0 = Accept all packets having an invalid CRC without further filtering
bit 5
CMDREJ: Command Frame Reject Enable bit
Setting this bit enables the user to reject all packets with FrameCtrl (Type) equal to Command.
1 = Reject all Command packets
0 = Disable Command Frame Rejection
bit 4
DATAREJ: Data Frame Reject Enable bit
Setting this bit enables the user to reject all packets with FrameCtrl (Type) equal to Data.
1 = Reject all Data packets
0 = Disable Data Frame Rejection
bit 3
UNIREJ: Unicast Reject Enable bit⁽²⁾
Setting this bit enables the user to reject all unicast packets as in:
802.15.4 Mode: PAN Identifier matches with the PANID<15:0> or 0xFFFF, and Destination Address
matches the address in the ADDR<63:0> or SHADDR<15:0> register, which the DAMode selects.
Proprietary Mode: Destination Address matches the address in ADDR<ADDRSZ<2:0>*8-1:0> reg-
ister, provided that DAddrPrsnt Frame Control field is set⁽¹⁾.
1 = Reject all Unicast packets addressed to this node
0 = Disable Unicast Rejection
Note 1:
2:
3:
4:
In Proprietary mode (FRMFMT = 1), when CRCREJ = 1 is used to reject unicast frames not addressed to
this node. NOTMEREJ = 1 does not reject these frames.
UNIREJ does not affect the frames using implied destination addressing in 802.15.4 mode and inferred
destination addressing in Proprietary mode.
NOTMEREJ does not affect the frames using implied destination addressing in 802.15.4 mode and
inferred destination addressing in Proprietary mode.
NSTDREJ does not affect the Proprietary frames in Proprietary mode.
DS70005023C-page 42
Preliminary
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