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AS7000 датащи(PDF) 41 Page - ams AG |
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AS7000 датащи(HTML) 41 Page - ams AG |
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41 / 92 page ![]() ams Datasheet Page 41 [v1-12] 2018-Feb-26 Document Feedback AS7000 − Detailed Description Optical Signal Conditioning Registers Register bit sigref_en see register AFE_LED_CFG. Figure 53: AFE_SC_CFG 0x70: AFE_SC_CFG Field Name Rst Type Description 26 sd_pol_init 0 RW The low level driver shall ensure that this register is 0 if one of the seq_sdm pulses is first, and is 1 if the seq_sdp is first within a sequence. 25:24 aa_freq 0 RW Anti-aliasing filter cut-off frequency Setting Signal 010kHz 120kHz 240kHz 360kHz 20:13 sd_subs 0 RW Synchronous demodulator subsampling ratio between sequencer frequency and ADC sampling frequency. ADC-Fsample = Sequencyer_Frequency/(sd_subs+1) When setting to 0, then in every sequencer iteration the ADC will run. When setting to 1, then the first sequencer iteration will not trigger the ADC, but the second one will. Setting to N will make N iterations without ADC, followed by one iteration with the ADC measurement executed. It is recommended to use the ADC interrupt in this case and not the sequencer interrupt. 12:11 sd_bw 0 RW Synchronous demodulator low pass filter. Setting Frequency 010Hz 120Hz 240Hz 380Hz 10 hp_en 0 RW 0...Power down of the high pass filter 1...Enable high pass filter 9hp_byp 0 RW 0...HP filter is used 1...HP filter is bypassed |
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