mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 103

• Manufacturer Part Number: mc68hc908lj24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

7.1 Contents
7.2 Introduction
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
Data Sheet — MC68HC908LJ24
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
32.768kHz crystal (x-tal) oscillator
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Internal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
X-tal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Oscillator During Break Mode. . . . . . . . . . . . . . . . . . . . . . . . . 107
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Crystal Amplifier Input Pin (OSC1). . . . . . . . . . . . . . . . . . . 106
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . . 106
Oscillator Enable Signal (SIMOSCEN). . . . . . . . . . . . . . . . 106
Internal RC Clock (ICLK) . . . . . . . . . . . . . . . . . . . . . . . . . . 106
CGM Oscillator Clock (CGMXCLK) . . . . . . . . . . . . . . . . . . 106
CGM Reference Clock (CGMRCLK) . . . . . . . . . . . . . . . . . 106
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Oscillator (OSC)
Section 7. Oscillator (OSC)
Data Sheet
103