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 7 of 30
NXP Semiconductors
NTAG203
NFC Forum Type 2 Tag compliant IC with 144 bytes user memory
8.2 State diagram and logical states description
Commands are initiated by the NFC device and controlled by the NTAG203 command
interpreter. This processes the internal states and generates the appropriate response.
In all states, the command interpreter will return to the idle state on receipt of an unexpected
command. If the IC was previously in the halt state, it will return to that state.
Fig 4. Communication principle state diagram - 4-byte; 16-byte
001aak569
POR
Idle
state
Halt
state
STAT E
DIAGRAM
TYPICAL
TRANSACTION
TIME
5 ms without collision
+1 ms for each collision
READ (16 bytes): 2.0 ms
WRITE (4 bytes): 4.6 ms
C. WRITE (4 bytes): 6.2 ms
Ready 1
state
Ready 2
state
Active
state
ANTICOLLISION command
ANTICOLLISION command
READ
of 16 Byte
WRITE
of 4 Byte
READ command
from address 0
READ command
from address 0
SELECT command
of cascade level 1
SELECT command
of cascade level 2
WUPA command
HALT command
REQA command
WUPA command
memory
operations
identification
and
selection
procedure