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ST25R3911B bảng dữ liệu(PDF) 30 Page - STMicroelectronics

tên linh kiện ST25R3911B
Giải thích chi tiết về linh kiện  High performance HF reader / NFC initiator with 1.4 W supporting VHBR and AAT
PDF  116 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST25R3911B bảng dữ liệu(HTML) 30 Page - STMicroelectronics

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Figure 20. Direct command NFC response field ON
MS42451V1
TADT
TARFG
n x TRFW
Start
RF on
TRFW
Table 10. Timing parameters of NFC Field ON commands
Symbol
Parameter
Value
Unit
Comments
TIDT
Initial delay time
4096
/fc
NFC Initial Field ON
TRWF
RF waiting time
512
-
TIRFG
Initial guard time
>5
ms
NFC Initial Field ON
TADT
Active delay time
768
/fc
NFC response field ON
TARFG
Active guard time
1024
Go to normal NFC mode
This command is used to transition from NFC target bit rate detection mode to normal mode. Additionally it copies
the content of the NFCIP Bit Rate Detection Display register to the NFCIP bit rate detection display register and
correctly sets the bit tr_am in the Auxiliary definition register.
Analog preset
This command is used to preset receiver and transmitter configuration based on state of Mode definition register
and Bit rate definition register. In case of Sub-carrier bit stream or BPSK bit stream mode, this command should
not be used. The list of configuration bits that are preset is given in Table 11.
ST25R3911B
Application information
DS11793 - Rev 6
page 30/116



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