參數(shù)資料
型號： ISO15693
廠商： Fujitsu Limited
英文描述： High-speed RFID LSI FerVID family
中文描述： 高速大規(guī)模集成電路的RFID書中家庭
文件頁數(shù)： 11/45頁
文件大?。?/td> 257K
代理商： ISO15693
MB89R118
11
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).
Also the Fast commands (Custom commands) supports the 2 data rate modes specified by
the Data_rate_flag. 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)
Bit coding : The Manchester coding is used for the bit coding. The following figure shows the signals
modulated in high data rate mode when standard command is used, and the next following
figure shows the same signals when fast command is used. In low data rate mode of both
standard commands and fast commands, the number of pulses for subcarrier and data transfer
time is 4 times as large as the number in high data rate mode.
Signal waveforms by load modulation in high data rate mode (standard commands)
37.76
μ
s
37.76
μ
s
Logic 0
Logic 1
423.75 kHz subcarrier
18.88
μ
s (modulated)
18.88
μ
s
(not modulated)
423.75 kHz subcarrier
18.88
μ
s
(not modulated)
18.88
μ
s (modulated)
18.88
μ
s
9.44
μ
s
9.44
μ
s
18.88
μ
s
9.44
μ
s
9.44
μ
s
Logic 0
Logic 1
Signal waveforms by load modulation in high data rate response mode (fast commands)
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