User's Manual

USER MANUAL

PTM 215ZE – 2.4 GHz IEEE 802.15.4 Pushbutton Transmitter Module

3.2.2 MAC Header

The IEEE 802.15.4 MAC Header contains the following fields:

 Frame Control Field (2 byte)

The Frame Control Field is set to 0x0801 in all PTM 215ZE telegrams in order to identify

them as data telegrams with short addresses based on version IEEE 802.15.4-2003

 Sequence Number (1 byte)

The Sequence Number is an incremental number used to identify the order of telegrams

 Address Field (4 byte in PTM 215ZE implementation)

The Address Field is set to 0xFFFFFFFF to identify PTM 215ZE telegrams as broadcast tel-

egrams using short Destination Address (16 Bit) together with the Destination PAN ID (16

Bit). Source address and Source PAN ID are not present in PTM 215ZE MAC Header.

3.2.3 MAC Trailer

The MAC Trailer only contains the Frame Check Sum (FCS) field.

Its length is 2 byte and it is calculated as Cyclic Redundancy Check (CRC16) over the entire

MAC payload including the Length of Frame field of the PHY Header using the following poly-

nomial: x

+ x

+ 1