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STV3550 数据表(PDF) 138 Page - STMicroelectronics |
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STV3550 数据表(HTML) 138 Page - STMicroelectronics |
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138 / 144 page ![]() 138/144 STV3550 Timing Specifications 10.3 Clock Timings 10.3.1 XTALIN Timings Figure 83: Reset Timings Symbol Parameter Min Nom Max Units Notes tDCLDCH EXTALIN Pulse Width Low 6 ns tDCHDCL EXTALIN Pulse Width High 10 ns tDCLDCL EXTALIN Period 37 ns 1, 2 1. Measured between corresponding points on consecutive falling edges. 2. Variation of individual falling edges from their nominal times. tDCr CLKXTP Rise Time 10 ns 3 3. Clock transitions must be monotonic within the range VIH to VIL. tDCf CLKXTM Fall Time 10 ns 10.3.1 Figure 84: XTALIN Timings notRST VDD 3.6 3.0 0 tRSTHRSTL ≥ 10ms 2.0V 1.5V 0.8V tDCLDCH tDCHDCL tDCLDCL 90% 10% tDCf 90% 10% tDCr |
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