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MC68HC908AP16CFB Datasheet(PDF) 9 Page - Motorola, Inc |
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MC68HC908AP16CFB Datasheet(HTML) 9 Page - Motorola, Inc |
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9 / 440 page  Table of Contents MC68HC908AP Family — Rev. 2.5 Data Sheet MOTOROLA 9 Section 7. Oscillator (OSC) 7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 7.2 Clock Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 7.2.1 CGM Reference Clock Selection . . . . . . . . . . . . . . . . . . . . . 93 7.2.2 TBM Reference Clock Selection . . . . . . . . . . . . . . . . . . . . . 94 7.3 Internal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 7.4 RC Oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 7.5 X-tal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 7.6 I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 7.6.1 Crystal Amplifier Input Pin (OSC1). . . . . . . . . . . . . . . . . . . . 97 7.6.2 Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . . . 98 7.6.3 Oscillator Enable Signal (SIMOSCEN). . . . . . . . . . . . . . . . . 98 7.6.4 CGM Oscillator Clock (CGMXCLK) . . . . . . . . . . . . . . . . . . . 98 7.6.5 CGM Reference Clock (CGMRCLK) . . . . . . . . . . . . . . . . . . 98 7.6.6 Oscillator Clock to Time Base Module (OSCCLK) . . . . . . . . 98 7.7 Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 7.7.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 7.7.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 7.8 Oscillator During Break Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 99 Section 8. Clock Generator Module (CGM) 8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 8.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 8.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 8.3.1 Oscillator Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 8.3.2 Phase-Locked Loop Circuit (PLL) . . . . . . . . . . . . . . . . . . . 105 8.3.3 PLL Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 8.3.4 Acquisition and Tracking Modes . . . . . . . . . . . . . . . . . . . . 107 8.3.5 Manual and Automatic PLL Bandwidth Modes. . . . . . . . . . 107 8.3.6 Programming the PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 8.3.7 Special Programming Exceptions . . . . . . . . . . . . . . . . . . . 113 8.3.8 Base Clock Selector Circuit . . . . . . . . . . . . . . . . . . . . . . . . 113 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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