MC68HC908JL8 MOTOROLA [Motorola, Inc], MC68HC908JL8 Datasheet - Page 110

• Manufacturer Part Number: MC68HC908JL8
• Description: Motorola reserves the right to make changes without further notice to any products herein
• Manufacturer: MOTOROLA [Motorola, Inc]

Oscillator (OSC)
8.2 Introduction
Technical Data
110
The oscillator module provides the reference clocks for the MCU system
and bus. Two oscillators are running on the device:
Selectable oscillator — for bus clock
The selected oscillator is used to drive the bus clock, the SIM, and other
modules on the MCU. The oscillator type is selected by programming a
bit FLASH memory. The RC and crystal oscillator cannot run
concurrently; one is disabled while the other is selected; because the RC
and XTAL circuits share the same OSC1 pin.
Non-selectable oscillator — for COP
This internal oscillator is used to drive the computer operating properly
(COP) module and the SIM. The internal oscillator runs continuously
after a POR or reset, and is always available.
Freescale Semiconductor, Inc.
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For More Information On This Product,
Crystal oscillator (XTAL) — built-in oscillator that requires an
external crystal or ceramic-resonator. This option also allows an
external clock that can be driven directly into OSC1.
RC oscillator (RC) — built-in oscillator that requires an external
resistor-capacitor connection only.
Internal oscillator — built-in RC oscillator that requires no external
components.
Go to: www.freescale.com
Oscillator (OSC)
MC68HC908JL8
MOTOROLA
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Rev. 2.0