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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST25R3911B 데이터시트(PDF) 30 Page - STMicroelectronics |
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ST25R3911B 데이터시트(HTML) 30 Page - STMicroelectronics |
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30 / 116 page  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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