HTMS8201FTK datasheet(26/57 Pages) NXP

26 / 57 page

HTMS1x01_8x01

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Product data sheet

COMPANY PUBLIC

Rev. 3.3 — 17 October 2014

152933

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.

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