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| HTMS8201FTK Datasheet, PDF (16/57 Pages) NXP Semiconductors – HITAG transponder IC | |||
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NXP Semiconductors
HTMS1x01; HTMS8x01
HITAG µ transponder IC
11.2 Mode switching protocol
After powering the HITAG µ transponder IC switches to the data exchange mode after
receiving one of the two possible switch commands from the RWD during the specified
switch window (see Table 9 and Figure 4 for details).
312.5 Ã Tc
232 Ã Tc
TTF operation in case
of no command
during switching window
001aak278
Fig 4. Switching window timing
Table 9. HITAG µ transponder IC air interface parameters [1]
Parameter
Description
Interrogation field modulation
Amplitude modulation (ASK), 90 - 100%
Encoding
Pulse Interval Encoding; Least Significant Bit (LSB) first
Bit rate
5.2 kbit/s typically
Mode switching
Either a specific 5 bit switch command or the detection of the
SOF as part of a valid HITAG µ transponder IC command,
transmitted after the interruption of the interrogation field for at
least 5 ms
Mode switch timing
HITAG µ transponder IC settling time: 312.5 ï´ TC switch
command window after HITAG µ transponder IC settling:
232.5 ï´ TC
All within cycle C in Figure 3.
Mode switch command
00011 or SOF sequence
[1] TC...Carrier period time (ï±ï¯ï±ï³ï´ï®ï²ï kHz = 7.45 ïs nominal)
HTMS1x01_8x01
Product data sheet
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 â 17 October 2014
152933
© NXP Semiconductors N.V. 2014. All rights reserved.
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