HTMS1x01_8x01 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.4 — 21 May 2015
152934 26 of 57
NXP Semiconductors
HTMS1x01; HTMS8x01
HITAG µ transponder IC
13. State diagram
13.1 General description of states
RF Off
The powering magnetic field is switched off or the HITAG µ transponder IC is out of the
field.
WAIT
After start up phase, the HITAG µ transponder IC is ready to receive the first command.
READY
The HITAG µ transponder IC enters this state after a valid command, except of the STAY
QUIET, SELECT or WRITE-ISO11785 command. If there are several HITAG µ
transponder ICs at the same time in the field of the RWD antenna, the anticollision
sequence can be started to determine the UID of every HITAG µ transponder IC.
SELECTED
The HITAG µ transponder IC enters the Selected state after receiving the SELECT
command with a matching UID. In the Selected state the respective commands with
SEL=1 are valid only for selected transponder.
Only one HITAG µ transponder IC can be selected at one time. If one transponder is
selected and a second transponder receives the SELECT Command, the first transponder
will automatically change to Quiet state.
QUIET
The HITAG µ transponder IC enters this state after receiving a STAY QUIET command or
when he was in selected state and receives a SELECT command addressed to another
transponder.
In this state, the HITAG µ transponder IC reacts to any request commandos where the
ADR flag is set.
ISO 11785 STATE
In this state the HITAG µ transponder IC replies according to the ISO 11785 protocol.
Remark:
In case of an invalid command the transponder will remain in his actual state.
