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 17 of 30
NXP Semiconductors
NTAG203
NFC Forum Type 2 Tag compliant IC with 144 bytes user memory
8.8.3 ANTICOLLISION and SELECT of cascade level 1
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 Ready1 state only. The
response is part 1 of the UID. Even with incorrect CRC value, the SELECT command will
be fully functional.
Table 11. ANTICOLLISION and SELECT of cascade level 1
Code Parameter Data Integrity mechanism Response
Anticollision: 93h 20h - Parity, BCC -
Anticollision: 93h 21h to 67h Part of the UID Parity, BCC Parts of UID
Select: 93h 70h First 3 bytes of UID Parity, BCC, CRC SAK (‘04’)
Remark: Time units are not to scale and rounded off to 10 s
Fig 11. ANTICOLLISION of cascade level 1
aaa-001145
CMD
CT UID of cascade level 1
180 ms
RWD
command
time
NTAG
response
90 ms
430 ms
93
ARG
20
88 SN0
SN1 SN2 BCC1
Remark: Time units are not to scale and rounded off to 10 s
Fig 12. SELECT of cascade level 1
aaa-001146
CMD
SAK CRC
780 ms
RWD
command
time
NTAG
response
90 ms
260 ms
93
ARG CT CRCUID of cascade level 1
70
88 SN0 SN1 SN2 BCC1 C0 C1
04 C0
C1