mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 89

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Technical Data — MC68HC908JB8•MC68HC08JB8•MC68HC08JT8
7.1 Contents
7.2 Introduction
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
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. The
crystal oscillator output signal passes through the clock doubler.
OSCXCLK is the output signal of the clock doubler. OSCXCLK is divided
by two before being passed on to the system integration module (SIM)
for bus clock generation.
Figure 7-1
various external components.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Oscillator During Break Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 92
Oscillator External Connections . . . . . . . . . . . . . . . . . . . . . . . .90
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Crystal Amplifier Input Pin (OSC1). . . . . . . . . . . . . . . . . . . . 91
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . . . 91
Oscillator Enable Signal (SIMOSCEN). . . . . . . . . . . . . . . . . 91
External Clock Source (OSCXCLK) . . . . . . . . . . . . . . . . . . . 91
Oscillator Out (OSCOUT). . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
shows the structure of the oscillator. The oscillator requires
Oscillator (OSC)
Section 7. Oscillator (OSC)
Technical Data
89