HTMS8301FUGSLASHAM datasheet(23/44 Pages) NXP

23 / 44 page

184430

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Product data sheet

PUBLIC

Rev. 3.0 — 18 March 2010

184430

23 of 44

NXP Semiconductors

HITAG µ

ISO 18000 transponder IC

14.3 INVENTORY

Upon reception of this command without error, all transponder ICs in the ready state shall

perform the anticollision sequence. The inventory (INV) flag shall be set to '1'. The NOS

flag determines whether 1 or 16 slots are used.

If AFI flag is set to ’1’ the transponder handles the request as error.

If a transponder IC detects any error, it shall remain silent.

[1]

Error and CRC are Manchester coded, UII is dual pattern coded.

[2]

Response within the according time slot.

Error Flag set to ’0’ indicates no error.

14.4 STAY QUIET

Upon reception of this command without error, a transponder IC in either ready state or

selected state enters the quiet state and shall not send back a response.

The STAY QUIET command with both SEL and ADR flag set to '0' or both set to '1' is not

allowed.

There is no response to the STAY QUIET request, even if the transponder detects an

error.

Table 14.

INVENTORY - Request format (00h)

Flags

Command

Mask length

Mask value

CRC-16

Description

(16)

No. of bits

10(1)10

000000

≤ n ≤ UII length

UII Mask

AC with 1

timeslot

00(1)10

000000

≤ n ≤ UII length

UII Mask

AC with 16

timeslot

Table 15.

Response to a successful INVENTORY request [1][2]

Error Flag

Data

CRC-16

Description

48 - n

(16)

No. of bits

Remaining UII without mask value

Table 16.

STAY QUIET - request format(01h)

Flags

Command

Data

CRC-16

Description

(48)

(16)

No. of bits:

01(1)00

000001

without UII

10(1)00

000001

UII

with UII

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