NTAG213F/216F
NXP Semiconductors
NFC Forum T2T IC with 144/888 bytes user memory and field detection
8.4.4 ACTIVE state
All memory operations and other functions like the originality check are operated in the
ACTIVE state.
The ACTIVE state is exited with the HLTA command and upon reception NTAG21xF
transits to the HALT state. Any other data received when the device is in this state is
interpreted as an error. Depending on its previous state NTAG21xF returns to either the
IDLE state or HALT state.
NTAG21xF transits to the AUTHENTICATED state after successful password verification
using the PWD_AUTH command.
8.4.5 AUTHENTICATED state
In this state, all memory operations as well as all operations on memory pages, which are
configured as password verification protected, can be accessed.
The AUTHENTICATED state is exited with the HLTA command and upon reception
NTAG21xF transits to the HALT state. Any other data received when the device is in this
state is interpreted as an error. Depending on its previous state NTAG21xF returns to
either the IDLE state or HALT state.
8.4.6 HALT state
HALT and IDLE states constitute the two wait states implemented in NTAG21xF. An
already processed NTAG21xF can be set into the HALT state using the HLTA command.
In the anticollision phase, this state helps the NFC device to distinguish between
processed tags and tags yet to be selected. NTAG21xF can only exit this state on
execution of the WUPA command. Any other data received when the device is in this state
is interpreted as an error and NTAG21xF state remains unchanged.
NTAG213F_216F
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.1 — 28 August 2013
262231
11 of 56
NXP [ NXP ]
