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MC68HC908AP16CFB Datasheet(PDF) 96 Page - Motorola, Inc |
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MC68HC908AP16CFB Datasheet(HTML) 96 Page - Motorola, Inc |
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96 / 440 page  Oscillator (OSC) Data Sheet MC68HC908AP Family — Rev. 2.5 96 MOTOROLA Figure 7-5. RC Oscillator 7.5 X-tal Oscillator The crystal (x-tal) oscillator circuit is designed for use with an external 32.768kHz crystal to provide an accurate clock source. In its typical configuration, the x-tal oscillator is connected in a Pierce oscillator configuration, as shown in Figure 7-6. This figure shows only the logical representation of the internal components and may not represent actual circuitry. The oscillator configuration uses five components: • Crystal, X1 (32.768kHz) • Fixed capacitor, C1 • Tuning capacitor, C2 (can also be a fixed capacitor) • Feedback resistor, R B • Series resistor, R S (optional) REXT CEXT VREG MCU OSC1 SIMOSCEN From SIM STOP_RCLKEN CONFIG2 RC OSCILLATOR EN See Section 24. for component value requirements. BUS CLOCK From SIM OSC2 RCCLK To Clock Selection MUX Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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