mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 95

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

7.4 I/O Signals
7.4.1 Crystal Amplifier Input Pin (OSC1)
7.4.2 Crystal Amplifier Output Pin (OSC1)
7.4.3 Oscillator Enable Signal (SIMOSCEN)
7.4.4 Crystal Output Frequency Signal (OSCXCLK)
7.4.5 Clock Doubler Out (OSCDCLK)
MC68HC908JB16
Freescale Semiconductor
—
Rev. 1.1
The following paragraphs describe the oscillator input/output (I/O)
signals.
The OSC1 pin is an input to the crystal oscillator amplifier.
The OSC2 pin is the output of the crystal oscillator inverting amplifier.
The SIMOSCEN signal comes from the system integration module (SIM)
and enables the oscillator.
OSCXCLK is the crystal oscillator output signal. It runs at the full speed
of the crystal (f
Figure 7-1
OSC2 and may not represent the actual circuitry. The duty cycle of
OSCXCLK is unknown and may depend on the crystal and other
external factors. Also, the frequency and amplitude of OSCXCLK can be
unstable at startup.
OSCDCLK is the clock doubler output signal. It runs at twice the speed
of the crystal (f
shows only the logical relation of OSCXCLK to OSC1 and
XCLK
XCLK
Oscillator (OSC)
) and comes directly from the crystal oscillator circuit.
) and comes from the clock doubler circuit.
Oscillator (OSC)
Technical Data
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