MB89R118 Datasheet, PDF (10/45 Pages) Fujitsu Component Limited. – ISO/IEC 15693 Compliant FRAM Embedded High-speed RFID LSI FerVID family

MB89R118
2. Communication from Transponder to Reader/Writer
• Minimum load modulation amplitude (Vlm) : 10 mV (based on ISO/IEC 10373-7)
• Load modulation subcarrier frequency (fs) : 423.75 kHz(fc/32)
The MB89R118 supports only a 1-subcarrier system.
(Not supports 2-subcarrier system.)
• Data rate : The MB89R118 supports the following 2 data rate modes :
• Low data rate
• High data rate
One of the 2 data rate modes is specified by the Data_rate_flag (described later) sent from
the reader/writer. In low data rate mode, the data rate is 6.62 kbps (fc/2048); in high data rate
mode, it is 26.48 kbps (fc/512).
When receiving the Fast commands (Custom commands) , the communication starts from the
transponder in the data rate that is twice as fast as normal data rate. In this case, the 2 data
rate modes of low data rate and high data rate specified by the Data_rate_flag is supported.
In Low data rate mode, the data rate is 13.24 kbps (fc/1024) ; in high data rate mode, it is
52.97 kbps (fc/256) .
(1) Bit coding
The Manchester coding is used for the bit coding. The following figures show the signals modulated in high data
rate mode when ISO command is received and the same signals when fast command is received. In low data
rate mode of both ISO commands and fast commands, the number of pulses for subcarrier and data transfer
time are 4 times as large as the number in high data rate mode.
• Signal waveforms by load modulation in high data rate mode (ISO commands)
• Logic 0
423.75 kHz subcarrier
• Logic 1
18.88 µs (modulated)
18.88 µs
(not modulated)
37.76 µs
423.75 kHz subcarrier
18.88 µs
(not modulated)
18.88 µs (modulated)
37.76 µs
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