Registers
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23.15.3 Register Descriptions
FRMFILT0 (0x6180) – Frame Filtering
Bit Name Reset R/W Description
No.
7 – 0 R/W Reserved. Always write 0
6:4
FCF_RESERVED_MASK[2:0]
000 R/W Used for filtering on the reserved part of the frame control field (FCF).
FCF_RESERVED_MASK[2:0] is ANDed with FCF[9:7]. If the result is
nonzero and frame filtering is enabled, the frame is rejected.
3:2
MAX_FRAME_VERSION[1:0]
11 R/W Used for filtering on the frame version field of the frame control field (FCF).
If FCF[13:12] (the frame version subfield) is higher than
MAX_FRAME_VERSION[1:0] and frame filtering is enabled, the frame is
rejected.
1
PAN_COORDINATOR
0 R/W Should be set high when the device is a PAN coordinator, to accept
frames with no destination address (as specified in section 7.5.6.2 of IEEE
802.15.4(b))
0: Device is not PAN coordinator.
1: Device is PAN coordinator.
0
FRAME_FILTER_EN
1 R/W Enables frame filtering
When this bit is set, the radio performs frame filtering as specified in
section 7.5.6.2 of IEEE 802.15.4(b), third filtering level. FRMFILT0[6:1]
and FRMFILT1[7:1], together with the local address information, define
the behavior of the filtering algorithm.
0: Frame filtering off. (FRMFILT0[6:1], FRMFILT1[7:1] and
SRCMATCH[2:0] are don't care.)
1: Frame filtering on.
FRMFILT1 (0x6181) – Frame Filtering
Bit Name Reset R/W Description
No.
7
ACCEPT_FT_4TO7_RESERVED
0 R/W Defines whether reserved frames are accepted or not. Reserved frames
have frame type = 100, 101, 110, or 111.
0: Reject
1: Accept
6
ACCEPT_FT_3_MAC_CMD
1 R/W Defines whether MAC command frames are accepted or not. MAC
command frames have frame type = 011.
0: Reject
1: Accept
5
ACCEPT_FT_2_ACK
1 R/W Defines whether acknowledgment frames are accepted or not.
Acknowledgement frames have frame type = 010.
0: Reject
1: Accept
4
ACCEPT_FT_1_DATA
1 R/W Defines whether data frames are accepted or not. Data frames have
frame type = 001.
0: Reject
1: Accept
3
ACCEPT_FT_0_BEACON
1 R/W Defines whether beacon frames are accepted or not. Beacon frames
have frame type = 000.
0: Reject
1: Accept
2:1
MODIFY_FT_FILTER[1:0]
00 R/W These bits are used to modify the frame-type field of a received frame
before frame-type filtering is performed. The modification does not
influence the frame that is written to the RXFIFO.
00: Leave as it is
01: Invert MSB
10: Set MSB to 0
11: Set MSB to 1
0 – 0 R/W Reserved. Always write 0
268
CC253x Radio SWRU191C–April 2009–Revised January 2012
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