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PTM 210 / PTM 215 / PTM 215U / PTM 215J User Manual May 2020 | Page 23/37
USER MANUAL
PTM 210 / PTM 215 / PTM 215U / PTM 215J
DC Step code and later
NFC HEADER
The NFC HEADER area contains information about the NFC memory structure and can
therefore be used to distinguish between different NFC memory layouts.
NFC HEADER area structure
The structure of the NFC HEADER area is shown in Figure 1 below.
NFC Address
Content
Byte 0
Byte 1
Byte 2
Byte 3
0x31
START (0xE0)
LENGTH (0x0A)
VERSION (0x01)
OEM MSB (0x00)
0x32
OEM LSB (0x0B)
DEVICE_IDENTIFIER (0x000003)
0x33
REVISION (0x03)
END (0xFE)
UNUSED (0x0000)
Figure 1 – NFC HEADER area structure
The NFC HEADER contains the following fields:
START
This field identifies the start of the NFC header and is always set to 0xE0
LENGTH
This field identifies the length of the NFC header.
For STM 550, this field is set to 0x0A since the header structure is 10 bytes long
VERSION
This field identifies the major revision and is set to 0x01 currently
OEM
The 16 bit OEM field identifies the manufacturer of the device so that manufacturer-
specific layout implementations can be determined.
For EnOcean GmbH this field is set to 0x000B
DEVICE_IDENTIFIER
The 24 bit DEVICE_IDENTIFIER field identifies an individual device from the range of
devices manufactured by the manufacturer specified in the OEM field.
For STM 550, the DEVICE_IDENTIFIER is set to 0x000003
REVISION
The REVISION field identifies the exact revision of the NFC layout. This REVISION will
be incremented whenever a change to the NFC layout is made.
END
The END field identifies the end of the NFC header and is always set to 0xFE. The
number of bytes from START to END must equal LENGTH, otherwise the NFC header
