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PTM 210 / PTM 215 / PTM 215U / PTM 215J User Manual May 2020 | Page 21/37
USER MANUAL
PTM 210 / PTM 215 / PTM 215U / PTM 215J
DC Step code and later
5.4
NFC parameters – Memory map
The NFC memory is organized in pages (smallest addressable unit) where each page contains
4 byte of data. Several pages with similar functionality form an NFC memory area.
These NFC pages are allocated into the following areas:
Device Identification NDEF string (Public read-only access; no PIN required)
This area contains an NDEF string identifying key device parameters
User Information NDEF string (Public read / write access; no PIN required)
This area allows any user to read or write information about the device such as the
intended installation location or additional instructions.
NFC HEADER (Public read-only access; no PIN required)
This area contains information about the NFC revision
INTERNAL DATA (Non-accessible)
This area contains calibration values and internal parameters and cannot be used
CONFIGURATION (Read and Write access, PIN required)
This area contains device configuration registers
The organization of the STM 550 NFC memory map is shown in Table 1 below.
NFC Address Memory Area
Content
PRODUCT NDEF
Device identification NDEF string (read-only)
USER NDEF
User information NDEF string (read / write access)
NFC HEADER
NFC memory revision (read-only)
0x40 … 0x54 CONFIGURATION
Configuration registers (Read / Write, PIN pro-
tected)
0x55 … 0xCF INTERNAL DATA
Internal data (Do not use)
Table 1 – STM 550 NFC memory areas
