HTMS1301FUGSLASHAM datasheet(29/44 Pages) NXP

29 / 44 page

184430

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Product data sheet

PUBLIC

Rev. 3.0 — 18 March 2010

184430

29 of 44

NXP Semiconductors

HITAG µ

ISO 18000 transponder IC

14.9 SELECT

The SELECT command is always be executed with SEL flag set to '0' and ADR flag set to

'1'. There are several possibilities upon reception of this command without error:

• If the UII, received by the transponder IC, is equal to its own UII, the transponder IC

enters the Selected state and shall send a response.

• If the received UII is different there are two possibilities

– A transponder IC in a non-selected state (QUIET or READY) is keeping its state

and not sending a response.

– The transponder IC in the Selected state enters the Quiet state and does not send

a response.

Error Flag set to ’0’ indicates no error.

Table 27.

SELECT - request format (18h)

Flags

Command

Data 1

CRC-16

Description

(16)

No. of bits

10(1)00

011000

UII

Table 28.

Response to a successful SELECT request

Error flag

CRC-16

Description

(16-bit)

No. of bits

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