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SLG46200 데이터시트(PDF) 40 Page - Dialog Semiconductor |
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SLG46200 데이터시트(HTML) 40 Page - Dialog Semiconductor |
40 / 69 page 000-0046200-124 Page 35 of 64 SLG46200 15.0 RC Oscillator (RC OSC) The RC Oscillator (RC OSC) of the SLG46200 provides an internal clock to the ADC, PWM, DLYs and Counters. It has a frequency range of 43kHz – 7.8MHz which can be adjusted by setting VREF and IBIAS. 15.1 RC Oscillator Functional Diagram 15.2 RCO Frequency Control The RCO produces an output timing signal that has a pulse width of 5 or 10ns depending on the clock frequency. If Clock Frequency > 1MHz, then the pulse width is set to 5ns If Clock Frequency < 1MHz, then the pulse width is set to 10ns The frequency is set based on the RCO_Vref_sel, RCO_Ibias_sel and the RCO_fs signals. The following table shows the various output frequencies of the four registers. Figure 21. RC Oscillator Functional Diagram RC Oscillator CLK4ADC ADC PWM Delay 0/1/2 Counter 0/2 CLK4PWM CLK4DLY CLK reg <465> reg <356> reg <355:354> reg <418> reg <417> cnt1_cki_ext RCO_force RCO_fs RCO_Ibias_sel RCO_Vref_sel RCO_clk_sel PIN 2 Counter 1 CLK CLK/4 CLK/8 CLK/12 /64 |
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