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AT86RF232
? Bit 5 - AACK_FLTR_RES_FT
Filter reserved frame types like data frame type. The register bit AACK_FLTR_RES_FT
shall only be set if register bit AACK_UPLD_RES_FT = 1.
Table 7-20. AACK_FLTR_RES_FT.
Register Bits
Value
Description
AACK_FLTR_RES_FT
0
1
(1)
(2)
Filtering reserved frame types is disabled
Filtering reserved frame types is enabled
Notes: 1.
2.
If AACK_FLTR_RES_FT = 0 the received reserved frame is only checked for a
valid FCS.
If AACK_FLTR_RES_FT = 1 reserved frame types are filtered similar to data
frames as specified in IEEE 802.15.4-2006.
Reserved frame types are explained in IEEE 802.15.4, Section 7.2.1.1.1.
? Bit 4 - AACK_UPLD_RES_FT
Upload reserved frame types within RX_AACK mode.
Table 7-21. AACK_UPLD_RES_FT.
Register Bits
AACK_UPLD_RES_FT
Value
0
Description
Upload of reserved frame types is disabled
1
(1)
Upload of reserved frame types is enabled
Note:
1.
If AACK_UPLD_RES_FT = 1 received frames indicated as a reserved frame are
further processed. For those frames, an IRQ_3 (TRX_END) interrupt is generated
if the FCS is valid.
In conjunction with the configuration bit AACK_FLTR_RES_FT, these frames are
handled like IEEE 802.15.4 compliant data frames during RX_AACK transaction. An
IRQ_5 (AMI) interrupt is issued, if the addresses in the received frame match the node’s
addresses.
That means, if a reserved frame passes the third level filter rules, an acknowledgement
frame is generated and transmitted if it was requested by the received frame. If this is
not wanted register bit AACK_DIS_ACK (register 0x2E, CSMA_SEED_1) has to be set.
? Bit 2 - AACK_ACK_TIME
The register bit AACK_ACK_TIME controls the acknowledgment frame response time
within RX_AACK mode.
Table 7-22. AACK_ACK_TIME.
Register Bits
AACK_ACK_TIME
Value
0
1
Description
Acknowledgment time is 12 symbols (aTurnaroundTime)
Acknowledgment time is two symbols
According to IEEE 802.15.4, Section 7.5.6.4.2 the transmission of an acknowledgment
frame shall commence 12 symbols ( aTurnaroundTime ) after the reception of the last
symbol of a data or MAC command frame. This is achieved with the reset value of the
register bit AACK_ACK_TIME.
Alternatively, if AACK_ACK_TIME = 1 an acknowledgment frame is sent already two
symbol periods after the reception of the last symbol of a data or MAC command frame.
67
8321A – MCU Wireless – 10/11
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