14.3.1.1.3 PHY Payload (PHY Service Data Unit, PSDU)

The PSDU has a variable length between zero and aMaxPHYPacketSize (127, maximum PSDU size in octets). The length of the PSDU is signaled by the frame length field (PHR), refer to Table 8‑1. The PSDU contains the MAC protocol data unit (MPDU), where the last two octets are used for the Frame Check Sequence (FCS).

Received frames with a frame length field set to zero (invalid PHR) are not signaled to the microcontroller.

The table below summarizes the type of payload versus the frame length value.