CC2520_11 Datasheet, PDF (105/133 Pages) Texas Instruments – 2.4 GHZ IEEE 802.15.4/ZIGBEE RF TRANSCEIVER

CC2520 DATASHEET
2.4 GHZ IEEE 802.15.4/ZIGBEE® RF TRANSCEIVER
SWRS068 – DECEMBER 2007
28.3 Register Descriptions
The heading for each register is built up according to the following pattern:
<Register name>, A <address>, R <reset value>, <Short register description>
FRMFILT0, A 0x000, R 0x0D, Frame filtering
Bit
Bit mnemonic
no.
7
RESERVED
6:4 FCF_RESERVED_MASK[2:0]
3:2 MAX_FRAME_VERSION[1:0]
1
PAN_COORDINATOR
0
FRAME_FILTER_EN
Reset
value
0
000
11
0
1
Mode
R/W
R/W
R/W
R/W
R/W
Description
Reserved. Always write ‘0’
Used for filtering on the reserved part of the frame control
field (FCF). FCF_RESERVED_MASK[2:0] is AND'ed with
FCF[9:7]. If the result is non-zero, and frame filtering is
enabled, the frame is rejected.
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.
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 in 802.15.4(b))
0 - Device is not PAN coordinator
1 - Device is PAN coordinator
Enables frame filtering.
When this bit is set, CC2520 will perform frame filtering as
specified in section 7.5.6.2 of 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.
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