mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 467

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Chapter 21
Oscillator (OSC)
21.1 Introduction
The OSC module is a crystal oscillator. The module, in conjunction with an external
crystal or resonator, generates a reference clock for the MCU.
21.2 Features and Modes
Key features of the module are:
Functional Description
Freescale Semiconductor, Inc.
• Supports 32 kHz crystals (Low Range mode)
• Supports 1–8 MHz, 8–32 MHz crystals and resonators (High Range mode)
• Automatic Gain Control (AGC) to optimize power consumption in high frequency
• High gain option in frequency ranges: 32 kHz, 1–8 MHz, and 8–32 MHz
• Voltage and frequency filtering to guarantee clock frequency and stability
• Optionally external input bypass clock from EXTAL signal directly
• One clock for MCU clock system
• Two clocks for on-chip peripherals that can work in Stop modes
ranges 1–8 MHz, 8–32 MHz using low-power mode
describes the module's operation in more detail.
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Preliminary
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