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 18 of 30
NXP Semiconductors
NTAG203
NFC Forum Type 2 Tag compliant IC with 144 bytes user memory
8.8.4 ANTICOLLISION and SELECT of cascade level 2
Description: The ANTICOLLISION and SELECT commands are based on the same
command code. They differ only in the parameter byte. This byte is per definition 70h in
case of SELECT. NTAG203 accepts these commands in the Ready2 state only. The
response is part 2 of the UID. Even with incorrect CRC value, the SELECT command will
be fully functional.
Table 12. ANTICOLLISION and SELECT of cascade level 2
Code Parameter Data Integrity mechanism Response
Anticollision: 95h 20h - Parity, BCC -
Anticollision: 95h 21h to 67h Part of the UID Parity, BCC Parts of UID
Select: 95h 70h Second 4 bytes of
UID
Parity, BCC, CRC SAK (‘00’)
Remark: Time units are not to scale and rounded off to 10 s
Fig 13. ANTICOLLISION of cascade level 2
aaa-001147
CMD
180 ms
RWD
command
time
NTAG
response
90 ms
430 ms
95
ARG
UID of cascade level 2
20
SN3 SN4
SN5
SN6
BCC2
Remark: Time units are not to scale and rounded off to 10 s
Fig 14. SELECT of cascade level 2
aaa-001148
CMD
780 ms
RWD
command
time
NTAG
response
90 ms
260 ms
95
ARG CRC
SAK CRC
UID of cascade level 1
70
SN3 SN4 SN5 SN6 BCC2 C0 C1
00 C0
C1