Datasheet

NTAG203 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet
COMPANY PROPRIETARY
Rev. 3.0 — 17 October 2011
213830 10 of 30
NXP Semiconductors
NTAG203
NFC Forum Type 2 Tag compliant IC with 144 bytes user memory
8.5 Memory organization
The 168 Bytes of the total memory organized in 42 user memory EEPROM. From that
amount, 144 Bytes (36 pages) are available for the user defined data. Each page contains
4 Bytes (32 bits). In the erased state the EEPROM cells are read as a logical “0”, in the
written state as a logical “1”.
8.5.1 UID/serial number
The unique 7 byte serial number (UID) and its two Block Check Character Bytes (BCC)
are programmed into the first 9 bytes of the memory. It therefore covers page 00h, page
01h and the first byte of page 02h. The second byte of page 02h is reserved for internal
data. Due to security and system requirements these bytes are write-protected after
having been programmed by the IC manufacturer after production.
According to ISO/IEC 14443-3 BCC0 is defined as CT  SN0  SN1  SN2.
Abbreviations CT stays for Cascade Tag byte (88h) and BCC1 is defined as SN3  SN4
 SN5  SN6.
SN0 holds the Manufacturer ID for NXP (04h) according to ISO/IEC 14443-3 and
ISO/IEC 7816-6 AMD.1.
Table 5. Memory organization
Page address Byte number
Decimal Hex 0 1 2 3
0 00h serial number
1 01h serial number
2 02h serial number internal lock bytes lock bytes
303hOTPOTPOTPOTP
4 to 39 04h to 27h user memory user memory user memory user memory
40 28h lock bytes lock bytes - -
41 29h 16-bit counter 16-bit counter - -
Fig 5. UID/serial number
001aai001
MSB LSB
page 0
byte
check byte 0
serial number
part 1
serial number
part 2
manufacturer ID for NXP Semiconductors (04h)00000100
0123
page 1
0123
page 2
0123
internal
check byte 1
lock bytes