HTMS8201FTK datasheet(17/57 Pages) NXP

17 / 57 page

HTMS1x01_8x01

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Product data sheet

COMPANY PUBLIC

Rev. 3.3 — 17 October 2014

152933

17 of 57

NXP Semiconductors

HTMS1x01; HTMS8x01

HITAG µ transponder IC

The RWD sends either the SOF at the start of a valid request or a special switch

command to the HITAG µ (as shown in Figure 5) in order to transfer it into the data

exchange mode.

11.2.1 SWITCH

Setting the transponder into data exchange mode (advanced mode) is done by sending

SOF pattern or the switch command within the listening window (232.5 x TC). The

SWITCH command itself does not contain SOF and EOF.

Fig 5.

Reader downlink modulation for SWITCH command

001aaj825

carrier on

stop condition

time

code violation

SOF

FDX ADV command

carrier off

transceiver

carrier on

carrier off

switch command

Table 10.

SWITCH Command

Command

Description

No. of bits

00011

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