MRF24XA_15 Datasheet, PDF (192/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
7.3 Auto-Repeater
The Auto-Repeat feature enables to automatically (with-
out Host Controller intervention) repeat any packets that
request it (FrameCtrl[Repeat] = 1). Auto-Repeat is not
available in RX- or TX- Streaming modes as these
modes are designed to provide maximum throughput
rather than reliable transport. Only Data and Command
frames are repeated with Auto-Repeat.
If MRF24XA receives a Data or Command frame with its
FrameCtrl[Repeat] bit set, the frame may be repeated
without MCU intervention when AUTORPTEN register
bit is set. If the packet is a Unicast packet, and its
Destination Address (explicit or inferred) matches the
ADDR<63:0> register, then the packet is not repeated,
but received as a normal packet instead. If the packet is
a Broadcast packet, or is a Unicast packet with a non-
matching address, the packet is received into the buffer,
and then retransmitted (repeated) without modification
(no CRC generation or encryption steps are performed).
It is recommended to use this function together with the
CSMA/CA algorithm to avoid the collision with the IDEN-
TREJ = 1 function. Therefore, packet received more
than twice is not repeated.
DS70005023C-page 192
Preliminary
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