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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST25R3910 데이터시트(PDF) 39 Page - STMicroelectronics |
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ST25R3910 데이터시트(HTML) 39 Page - STMicroelectronics |
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39 / 65 page  DocID029768 Rev 2 39/65 ST25R3910 55 1.3.3 Configuration Register 2 Address: 02h Type: RW Table 10. Configuration Register 2(1) Bit Name Default Function Comments 7 sing 0 1: Only RFO1 driver will be used Choose between single and differential antenna driving 6 envi 0 1: Input applied to RFI1 is envelope RF envelope input 5 tf2 0 1: Reduces first stage gain by 11 dB When both bits are set there is a 17 dB gain reduction 4 tf1 0 1: Reduces first stage gain by 6 dB 3 osc 1 0: 13.56 MHz Xtal 1: 27.12 MHz Xtal Selector for crystal oscillator 2 out_cl1 0 out_cl1 out_cl0 MCU_CLK Selection of clock frequency on MCU_CLK output. In case of “11” MCU_CLK output is permanently low. 1 out_cl0 0 00 3.39 MHz 01 6.78 MHz 1 0 13.56 MHz 1 1 No output 0 - - Not used - 1. Default setting takes place at power-up and after Set Default command. |
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