MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 124

• Manufacturer Part Number: MC68HC908LK24
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Clock Generator Module (CGM)
8.5.1 External Filter Capacitor Pin (CGMXFC)
8.5.2 PLL Analog Power Pin (V
8.5.3 PLL Analog Ground Pin (V
8.5.4 Oscillator Output Frequency Signal (CGMXCLK)
8.5.5 CGM Reference Clock (CGMRCLK)
Data Sheet
124
NOTE:
NOTE:
NOTE:
NOTE:
The CGMXFC pin is required by the loop filter to filter out phase
corrections. An external filter network is connected to this pin. (See
Figure
To prevent noise problems, the filter network should be placed as close
to the CGMXFC pin as possible, with minimum routing distances and no
routing of other signals across the network.
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.
On this MCU, the V
CGMXCLK is the oscillator output signal. It runs at the full speed of the
oscillator, and is generated directly from the crystal oscillator circuit, the
RC oscillator circuit, or the internal oscillator circuit.
CGMRCLK is a buffered version of CGMXCLK, this clock is the
reference clock for the phase-locked-loop circuit.
DDA
DDA
SSA
Freescale Semiconductor, Inc.
For More Information On This Product,
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
8-3.)
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
Go to: www.freescale.com
)
carefully for maximum noise immunity and place bypass
)
SSA
is physically bonded to the V
MC68HC908LJ24/LK24 — Rev. 2
DD
pin.
SS
SS
pin.
pin.
MOTOROLA