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ST25DV64K 数据表(PDF) 158 Page - STMicroelectronics

部件名 ST25DV64K
功能描述  Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, and fast transfer mode capability
PDF  200 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST25DV64K 数据表(HTML) 158 Page - STMicroelectronics

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Figure 89. Logic 1, low data rate, fast commands
75.52 µs
Note:
For fast commands, bit coding using two subcarriers is not supported.
A.2
ST25DVxxx to VCD frames
Frames are delimited by an SOF and an EOF. They are implemented using code violation. Unused options are
reserved for future use. For the low data rate, the same subcarrier frequency or frequencies is/are used. In this
case, the number of pulses is multiplied by 4. For the Fast commands using one subcarrier, all pulse numbers
and times are divided by 2.
A.3
SOF when using one subcarrier
A.3.1
High data rate
For the Fast commands, the SOF comprises an unmodulated time of 28.32 µs, followed by 12 pulses at 423.75
kHz (fC/32), and a logic 1 that consists of an unmodulated time of 9.44 µs followed by four pulses at 423.75 kHz,
as shown in Figure 90.
Figure 90. Start of frame, high data rate, one subcarrier, fast commands
56.64 µs
18.88 µs
A.3.2
Low data rate
For the Fast commands, the SOF comprises an unmodulated time of 113.28 µs, followed by 48 pulses at 423.75
kHz (fC/32), and a logic 1 that includes an unmodulated time of 37.76 µs followed by 16 pulses at 423.75 kHz, as
shown in Figure 91.
Figure 91. Start of frame, low data rate, one subcarrier, fast commands
226.56 µs
75.52 µs
ST25DV04K ST25DV16K ST25DV64K
ST25DVxxx to VCD frames
DS10925 - Rev 9
page 158/200



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