mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 108

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Oscillator (OSC)
7.7 I/O Signals
7.7.1 Crystal Amplifier Input Pin (OSC1)
Data Sheet
108
The series resistor (R
oscillator guidelines and may not be required for all ranges of operation,
especially with high frequency crystals. Refer to the crystal
manufacturer’s data for more information.
The following paragraphs describe the oscillator I/O signals.
OSC1 pin is an input to the crystal oscillator amplifier or the input to the
RC oscillator circuit.
*R
Refer to manufacturer’s data.
See
S
STOP_XCLKEN
can be zero (shorted) when used with higher-frequency crystals.
Section 24.
MCU
CONFIG2
for component value requirements.
From SIM
Oscillator (OSC)
SIMOSCEN
Figure 7-6. Crystal Oscillator
S
) is included in the diagram to follow strict Pierce
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
OSC1
C
1
R
X
B
1
To Clock Selection MUX
Freescale Semiconductor
OSC2
R
C
S
*
2
XCLK