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SH7014 Datasheet(PDF) 88 Page - Renesas Technology Corp |
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SH7014 Datasheet(HTML) 88 Page - Renesas Technology Corp |
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88 / 754 page  4. Clock Pulse Generator (CPG) Rev.5.00 Sep. 27, 2007 Page 54 of 716 REJ09B0398-0500 4.2 Oscillator Clock pulses can be supplied from a connected crystal resonator or an external clock. 4.2.1 Connecting a Crystal Oscillator Circuit Configuration: A crystal oscillator can be connected as shown in figure 4.2. Use the damping resistance (Rd) listed in table 4.1. Use a 4 to 10 MHz crystal oscillator (consult your dealer concerning the compatibility of the crystal oscillator and the LSI). XTAL EXTAL C L1 C L2 Rd 4 to 10 MHz C L1 = CL2 = 18 to 22 pF (Recommended value) Figure 4.2 Connection of the Crystal Oscillator (Example) Table 4.1 Damping Resistance Values (Recommended Values) Frequency (MHz) Parameter 4 8 10 Rd ( Ω) 500 200 0 Crystal Oscillator: Figure 4.3 shows an equivalent circuit of the crystal oscillator. Use a crystal oscillator with the characteristics listed in table 4.2. Co EXTAL C L LRs XTAL Figure 4.3 Crystal Oscillator Equivalent Circuit |
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