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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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SH7052 Scheda tecnica(PDF) 83 Page - Renesas Technology Corp |
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SH7052 Scheda tecnica(HTML) 83 Page - Renesas Technology Corp |
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83 / 919 page  57 Input clock (EXTAL pin) System clock (CK pin) Internal clock ( φ) Peripheral clock (P φ) Figure 4.2 Input Clock and System Clock 4.3 Clock Source Clock pulses can be supplied from a connected crystal resonator or an external clock. 4.3.1 Connecting a Crystal Oscillator Circuit Configuration: Figure 4.3 shows an example of connecting a crystal resonator. Use the damping resistance (Rd) shown in table 4.3. An AT-cut parallel-resonance type crystal resonator should be used. Load capacitors (CL1, CL2) must be connected as shown in the figure. The clock pulses generated by the crystal resonator and internal oscillator are sent to the PLL multiplier circuit, where a multiplied frequency is selected and supplied inside the SH7052F/SH7053F/SH7054F chip and to external devices. The crystal oscillator manufacturer should be consulted concerning the compatibility between the crystal oscillator and the chip. XTAL EXTAL CL2 CL1 Rd CL1 = CL2 = 18 to 22 pF (recommended value) Figure 4.3 Connection of Crystal Oscillator (Example) |
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