MC68HC908LJ12CPB FREESCALE [Freescale Semiconductor, Inc], MC68HC908LJ12CPB Datasheet - Page 94

• Manufacturer Part Number: MC68HC908LJ12CPB
• Description: 8-bit microcontroller units
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

7.1 Contents
7.2 Introduction
MC68HC908LJ12
Freescale Semiconductor
Technical Data — MC68HC908LJ12
—
Rev. 2.1
7.2
7.3
7.4
7.5
7.5.1
7.5.2
7.5.3
7.5.4
7.5.5
7.5.6
7.6
7.6.1
7.6.2
7.7
The oscillator module provides the reference clock for the clock
generator module (CGM), the real time clock module (RTC), and other
MCU sub-systems.
The oscillator module consist of two types of oscillator circuits:
•
•
Internal RC oscillator
Crystal (x-tal) oscillator
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Internal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Crystal (X-tal) Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Oscillator During Break Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 99
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Crystal Amplifier Input Pin (OSC1). . . . . . . . . . . . . . . . . . . . 98
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . . . 98
Oscillator Enable Signal (SIMOSCEN). . . . . . . . . . . . . . . . . 98
Internal RC Clock (ICLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
CGM Oscillator Clock (CGMXCLK) . . . . . . . . . . . . . . . . . . . 98
CGM Reference Clock (CGMRCLK) . . . . . . . . . . . . . . . . . . 98
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Oscillator (OSC)
Section 7. Oscillator (OSC)
Technical Data
95