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HD6432142 Scheda tecnica(PDF) 779 Page - Renesas Technology Corp |
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HD6432142 Scheda tecnica(HTML) 779 Page - Renesas Technology Corp |
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779 / 1177 page ![]() Section 24 Clock Pulse Generator Rev. 4.00 Sep 27, 2006 page 735 of 1130 REJ09B0327-0400 Table 24.3 Crystal Resonator Parameters Frequency (MHz) 2 4 8 10 12 16 20 R S max (Ω Ω Ω Ω) 500 120 80 70 60 50 40 C 0 max (pF) 777 7777 Note on Board Design When a crystal resonator is connected, the following points should be noted. Other signal lines should be routed away from the oscillator circuit to prevent induction from interfering with correct oscillation. See figure 24.4. When designing the board, place the crystal resonator and its load capacitors as close as possible to the XTAL and EXTAL pins. CL2 Signal A Signal B CL1 This LSI XTAL EXTAL Avoid Figure 24.4 Example of Incorrect Board Design |
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