s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 142

• Manufacturer Part Number: s908ab32ag0cfue
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Clock Generator Module (CGM)
9.5 I/O Signals
9.5.1 Crystal Amplifier Input Pin (OSC1)
9.5.2 Crystal Amplifier Output Pin (OSC2)
9.5.3 External Filter Capacitor Pin (CGMXFC)
9.5.4 PLL Analog Power Pin (V
9.5.5 Oscillator Enable Signal (SIMOSCEN)
Technical Data
142
NOTE:
NOTE:
The following paragraphs describe the CGM 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 CGMXFC pin is required by the loop filter to filter out phase
corrections. A small external capacitor is connected to this pin.
To prevent noise problems, C
CGMXFC pin as possible, with minimum routing distances and no
routing of other signals across the C
V
should be connected to the same voltage potential as the V
Route V
capacitors as close as possible to the package.
The SIMOSCEN signal comes from the system integration module (SIM)
and enables the oscillator and PLL.
DDA
is a power pin used by the analog portions of the PLL. The pin
DDA
DDA
Clock Generator Module (CGM)
)
carefully for maximum noise immunity and place bypass
F
should be placed as close to the
F
connection.
MC68HC908AB32
Freescale Semiconductor
DD
pin.
—
Rev. 1.1