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P9222-R Datasheet(PDF) 35 Page - Renesas Technology Corp |
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P9222-R Datasheet(HTML) 35 Page - Renesas Technology Corp |
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35 / 58 page ![]() P9222-R/RN Datasheet © 2019-2022 Renesas Electronics Corporation 35 May 5, 2022 Figure 31. P9222-R/RN Ping Detect Waveforms1 Note: When measuring the PDET_RC node, the probe impedance will alter the timing of PDETB, and this should be accounted for. Table 9 can be used to select the RC values for the PDET_RC pin. Table 9. Recommended RC Values for PDET_RC Components Based on Capacitance and Ping Interval Ping Interval (s) R (MΩ) C (µF) TPDETB_MIN (s) TPDETB_MAX (s) 0.55 0.422 2.2 0.66 1.36 0.75 0.59 2.2 0.92 1.89 0.9 0.698 2.2 1.098 2.26 1.2 0.887 2.2 1.38 2.85 0.412 4.7 1.37 2.83 1.4 1.1 2.2 1.71 3.54 0.511 4.7 1.70 3.51 2.2 1.69 2.2 2.64 5.45 0.787 4.7 2.62 5.41 6.5 5.11 2.2 7.95 16.43 2.32 4.7 7.80 16.12 1 R12 = 1MΩ, C15 = 2.2µF, Ch1 = Tx SW Node, Ch2 = PDETB, Ch3 = VRECT, Ch4 = PDET_RC, 25°C, 550ms Ping Interval T PDETB |
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