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 19 of 30
NXP Semiconductors
NTAG203
NFC Forum Type 2 Tag compliant IC with 144 bytes user memory
8.8.5 READ
Description: The READ command needs the page address as a parameter. Only
addresses 00h to 29h are decoded. For higher addresses, NTAG203 returns a NAK. The
NTAG203 responds to the READ command by sending 16 bytes starting from the page
address defined in the command (e.g. if ADR is ‘03h‘ pages 03h, 04h, 05h, 06h are
returned. If ADR is ‘29h’, the contents of pages 29h, 00h, 01h and 02h is returned).
8.8.6 HALT
Description: The HALT command is used to set already processed NTAG203 devices
into a different waiting state (Halt instead of Idle), which allows a simple separation
between devices whose UIDs are already known (as they have already passed the
anticollision procedure) and devices that have not yet been identified by their UIDs. This
mechanism is a very efficient way of finding all contactless devices in the field of a NFC
device. Even with incorrect parity value, the HALT command will be fully functional.
Table 13. READ
Code Parameter/ARG Data Integrity mechanism Response
30h ADR: ‘00h’ to ‘29h‘ - Parity, CRC 16 Byte Date
Remark: Time units are not to scale and rounded off to 10 s
Fig 15. READ
aaa-001149
CMD
350 ms
RWD
command
time
NTAG
response
90 ms
50 ms
1540 ms
30
ARG CRC
16 byte data CRC
ADR
NAK
C0 C1
D0 D1
D2 ... D13
D14 D15 C0
C1
Table 14. HALT
Code Parameter Data Integrity mechanism Response
50h 00h - Parity, CRC Passive ACK, NAK
Remark: Time units are not to scale and rounded off to 10 s
Fig 16. HALT
aaa-001150
CMD
350 ms
RWD
command
time
NTAG
response
90 ms 50 ms
50
ADR CRC
00
NAK
C0 C1
- - -ACK