HTMS8301FUGSLASHAM datasheet(12/44 Pages) NXP

12 / 44 page

184430

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Product data sheet

PUBLIC

Rev. 3.0 — 18 March 2010

184430

12 of 44

NXP Semiconductors

HITAG µ

ISO 18000 transponder IC

10.2 Communication signal interface - HITAG µ ISO 18000 transponder IC

to RWD

10.2.1 Data rate and data coding

The HITAG µ ISO 18000 transponder IC accepts the following data rate and encoding

scheme:

• 1/TFd Manchester coded data signal on the response to the HITAG µ ISO 18000

transponder IC

• 1/(2 ×TFd) dual pattern data coding when responding within the inventory process

TFd = 32 / fc = 32 × Tc

Remark: The slower data rate used during the inventory process allows for improving the

collision detection when several HITAG µ ISO 18000 transponder ICs are present in the

RWD field, especially if some transponder ICs are in the near field and others in the far

field.

Fig 7.

HITAG µ ISO 18000 transponder IC - Load modulation coding

001aaj830

TFd

load off

data "0"

load on

TFd

load off

load on

TFd

load off

data "1"

load on

TFd

load off

load on

TFd

response encoding in

INVENTORY mode

response encoding to a RWD

request in data exchange mode

data

element

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