XC68HC08KH12 Motorola, XC68HC08KH12 Datasheet - Page 98

• Manufacturer Part Number: XC68HC08KH12
• Description: MICROCONTROLLER
• Manufacturer: Motorola

Clock Generator Module (CGM)
8.5 I/O Signals
8.5.1 Crystal Amplifier Input Pin (OSC1)
8.5.2 Crystal Amplifier Output Pin (OSC2)
8.5.3 External Filter Capacitor Pin (CGMXFC)
8.5.4 PLL Analog Power Pin (V
8.5.5 PLL Analog Ground Pin (V
Advance Information
98
NOTE:
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
V
Route V
capacitors as close as possible to the package.
V
the V
Route V
capacitors as close as possible to the package.
DDA
DDA
SSA
SSA
is a ground pin used by the analog portions of the PLL. Connect
is a power pin used by the analog portions of the PLL. Connect the
pin to the same voltage potential as the V
DDA
SSA
DDA
pin to the same voltage potential as the V
SSA
Clock Generator Module (CGM)
carefully for maximum noise immunity and place bypass
)
carefully for maximum noise immunity and place bypass
)
F
should be placed as close to the
F
connection.
MC68HC(7)08KH12
DD
pin.
SS
pin.
MOTOROLA
—
Rev. 1.0