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AK2401 Folha de dados(PDF) 81 Page - Asahi Kasei Microsystems |
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AK2401 Folha de dados(HTML) 81 Page - Asahi Kasei Microsystems |
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81 / 103 page  [AK2401] 017003093-E-00 2017/3 81 AGCTIM[2:0]: Calculation/Detection Time Setting of Signal Power Set signal power calculation/detection time of AGC. The power calculation/detection time is calculated by the equation shown below. Power calculation/detection times in the case of using 18.432MHz and 19.2MHz reference clocks are shown in the table below. Power Calculation/Detection Time = Reference Clock Cycle × 2048 ×2 N *N: AGCTIM bits Setting Value AGCTIM Power Calculation/Detection Time Unit [2] [1] [0] 18.432MHz 19.2MHz 0 0 0 0.11 0.11 msec 0 0 1 0.22 0.21 0 1 0 0.44 0.43 0 1 1 0.89 (default) 0.85 (default) 1 0 0 1.79 1.71 1 0 1 3.56 3.41 1 1 0 7.11 6.83 1 1 1 14.22 13.65 AGCHYS[1:0]: Hysteresis Width of Signal Power Convergence Level AGC (Automatic Gain Control) stops gain controlling when the current receiving level is within the range of this setting (convergence detection level) against the AGC convergence target level set by AGCTGT[2:0] bits <Address 0x20>. AGCHYS Convergence Detection Level Unit [1] [0] 0 0 < ±1 (default) dB 0 1 < ±2 1 0 < ±4 1 1 < ±8 AGC_KEEP_SEL: Control Method Setting for the AGC_KEEP Function This bit selects register or pin control of the AGC_KEEP function. 0: Control by AGC_KEEPR bit 1: Control by the AGC_KEEP pin AGC_KEEPR: ON/OFF Setting of the AGC KEEP Function Set ON/OFF of the AGC KEEP function. This setting will only be valid when setting AGC_KEEP_SEL bit = “0” <Address 0x1F> 0: AGC KEEP Function OFF 1: AGC KEEP Function ON AGCKP_MODE bit <Address 0x21> controls operation of the AGC KEEP function. AGCOFF: ON/OFF Setting of AGC (Automatic Gain Control) Function Set ON/OFF of the AGC function. AGC is performed in PGA and LNA blocks. LNA gain control can be applied to PGA by setting LNA_AGCOFF bit = “0” <Address0x20> when AGCOFF bit= “0”. Normally AGCOFF bit should be set to “0”. 0: AGC Function ON 1: AGC Function OFF |
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