14.6.8.1 Overview

The Start of Frame Delimiter (SFD) is a field indicating the end of the SHR and the start of the packet data. The length of the SFD is one octet (eight symbols for BPSK and two symbols for O-QPSK). The octet is used for byte synchronization only and is not included in the AT86RF212B Frame Buffer.

The value of the SFD can be changed if it is needed to operate in non-IEEE 802.15.4 compliant networks. A node with a non-standard SFD value cannot synchronize with any of the IEEE 802.15.4 network nodes.

Due to the way the SHR is formed, it is not recommended to set the low-order four bits to zero. The LSB of the SFD is transmitted first, that is right after the last bit of the preamble sequence.