USER MANUAL V1.0
© 2016 EnOcean | www.enocean.com
F-710-017, V1.0
PTM 535Z User Manual | v1.0 | March 2016 | Page 22/38
PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE
3.2
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 535Z 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 535Z implementation)
PTM 535Z uses short Destination Address (16 Bit) together with the Destination PAN ID
(16 Bit). Both are set to 0xFFFF to identify the telegrams as broadcast.
Source address and Source PAN ID are not present in PTM 535Z telegrams.
3.3
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” field of the PHY Header using the following polynomial:
x
16
+ x
12
+ x
5
+ 1
3.4
MAC Payload
The MAC Payload depends on the telegram type:
Telegram type
-
Data Telegram
-
Commissioning Telegram
Security mode
-
Secure communication
-
Standard communication
MAC payloads for the different telegram types are described in the following chapters.
