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ST25R3911B 数据表(PDF) 9 Page - STMicroelectronics

部件名 ST25R3911B
功能描述  Automatic antenna tuning system providing tuning of antenna LC tank
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST25R3911B 数据表(HTML) 9 Page - STMicroelectronics

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ST25R3911B
List of figures
9
List of figures
Figure 1.
ST25R3911B block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 2.
Minimum configuration with single sided antenna driving (including EMC filter) . . . . . . . . 14
Figure 3.
Minimum configuration with differential antenna driving (including EMC filter). . . . . . . . . . 14
Figure 4.
Receiver block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 5.
Capacitive sensor block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 6.
Phase detector inputs and output in case of 90º phase shift . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 7.
Phase detector inputs and output in case of 135º phase shift . . . . . . . . . . . . . . . . . . . . . . 28
Figure 8.
ST25R3911B power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 9.
Exchange of signals with microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 10.
SPI communication: writing a single byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 11.
SPI communication: writing multiple bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 12.
SPI communication: reading a single byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 13.
SPI communication: loading of FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 14.
SPI communication: reading of FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 15.
SPI communication: direct command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 16.
SPI communication: direct command chaining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 17.
SPI general timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 18.
SPI read timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 19.
Direct command NFC Initial Field ON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 20.
Direct command NFC Response Field ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 21.
ISO14443A states for PCD and PICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 22.
Selection of MRT and NRT for a given FDT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 23.
Flowchart for ISO14443A anticollision with ST25R3911B . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 24.
FeliCa™ frame format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 25.
Transport frame format according to NFCIP-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 26.
Connection of tuning capacitors to the antenna LC tank . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 27.
Example of sub-carrier stream mode for scf = 01b and scp = 10b . . . . . . . . . . . . . . . . . . . 70
Figure 28.
Example of BPSK stream mode for scf = 01b and scp = 10b. . . . . . . . . . . . . . . . . . . . . . . 71
Figure 29.
Example of Tx in Stream Mode for stx = 000b and OOK modulation . . . . . . . . . . . . . . . . . 71
Figure 30.
ST25R3911B QFN32 pinout(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Figure 31.
TCASE vs. power with different copper area at Tamb = 25°C . . . . . . . . . . . . . . . . . . . . . 123
Figure 32.
RthCA vs. copper area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Figure 33.
QFN32 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124


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