HTMS8301FUGSLASHAM datasheet(16/44 Pages) NXP

16 / 44 page

184430

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Product data sheet

PUBLIC

Rev. 3.0 — 18 March 2010

184430

16 of 44

NXP Semiconductors

HITAG µ

ISO 18000 transponder IC

11.3.2 RWD receives no HITAG µ ISO 18000 transponder IC response

During an inventory process, when the RWD has received no HITAG µ ISO 18000

transponder IC response, it needs to wait TFp3 before sending a subsequent EOF to

switch to the next slot, if a 16 slot anticollision request is processed, or sending a

subsequent request (which could be again an inventory request).

TFp3 starts from the time the RWD has generated the falling edge of the last sent EOF.

The minimum value of TFp3 is TFp3min = TFp1max + TFpSOF.

TFpSOF is the time duration for a HITAG µ ISO 18000 transponder IC to transmit an SOF to

the RWD.

[1]

TC...Carrier period time (1/125kHz = 8 μs nominal)

Fig 10. Protocol timing diagram without HITAG µ ISO 18000 transponder IC response

Table 7.

Overview timing parameters [1]

Symbol

Min

Max

TFpSOF

× TFd

TFp1

204

× TC

213

× TC

TFp2

150

× TC

TFp3

TFp1max + TFpSOF

001aaj834

carrier on

request

no response

request (or EOF)

carrier off

load off

load on

HITAG

reader

TFpSOF

TFp3

TFp1MAX

HTMS8301FUG/AM Datasheet(PDF) 16 Page - NXP Semiconductors

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