mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 95

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

7.1 Contents
7.2 Introduction
MC68HC908LD64
Freescale Semiconductor
Data Sheet — MC68HC908LD64
—
Rev. 3.0
7.2
7.3
7.4
7.4.1
7.4.2
7.4.3
7.4.4
7.4.5
7.5
7.5.1
7.5.2
7.6
The oscillator circuit is designed for use with crystals or ceramic
resonators. The oscillator circuit generates the crystal clock signal,
OSCXCLK, at the frequency of the crystal. This signal is divided by two
before being passed on to the SIM for bus clock generation.
shows the structure of the oscillator. The oscillator requires various
external components.
The MC68HC908LD64 operates from a nominal 24MHz crystal or
external clock, providing an 8MHz internal bus clock. The 24MHz clock
is required for various modules, such as the CGM and USB.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Oscillator During Break Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 98
Oscillator External Connections . . . . . . . . . . . . . . . . . . . . . . . .96
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Crystal Amplifier Input Pin (OSC1). . . . . . . . . . . . . . . . . . . . 97
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . . . 97
Oscillator Enable Signal (SIMOSCEN). . . . . . . . . . . . . . . . . 97
External Clock Source (OSCXCLK) . . . . . . . . . . . . . . . . . . . 97
Oscillator Out (OSCOUT). . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Oscillator (OSC)
Section 7. Oscillator (OSC)
Figure 7-1
Data Sheet
95