HTMS8201FTK datasheet(18/57 Pages) NXP

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HTMS1x01_8x01

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Product data sheet

COMPANY PUBLIC

Rev. 3.3 — 17 October 2014

152933

18 of 57

NXP Semiconductors

HTMS1x01; HTMS8x01

HITAG µ transponder IC

11.3 Downlink communication signal interface - RWD to HITAG µ

transponder IC

11.3.1 Modulation parameters

Communications between RWD and HITAG µ transponder IC takes place using ASK

modulation with a modulation index of m > 90%.

[1]

TF3 shall not exceed TFd0 - TF1 - 3  Tc

[2]

TC...Carrier period time (kHz = 7.45 s nominal)

Fig 6.

Modulation details of data transmission from RWD to HITAG µ transponder IC

Table 11.

Modulation coding times[1][2]

Symbol

Min

Max

m = (a-b)/(a+b)

90%

100%

TF1

 T

 T

TF2

00.5

 T

TF3

00.5

 T

Fd0

0.05

 a

0.05

 a

001aaj826

TF2

TF1

TF3

envelope of transceiver field

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