mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 123

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

7.5.3 External Filter Capacitor Pin (CGMXFC)
7.5.4 PLL Analog Power Pin (V
7.5.5 PLL Analog Ground Pin (V
7.5.6 Oscillator Enable Signal (SIMOSCEN)
7.5.7 Oscillator Stop Mode Enable Bit (OSCSTOPENB)
MC68HC908GP20
Freescale Semiconductor
NOTE:
NOTE:
NOTE:
—
Rev 2.1
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.
The SIMOSCEN signal comes from the system integration module (SIM)
and enables the oscillator and PLL.
OSCSTOPENB is a bit in the CONFIG register that enables the oscillator
to continue operating during stop mode. If this bit is set, the Oscillator
continues running during stop mode. If this bit is not set (default), the
oscillator is controlled by the SIMOSCEN signal which will disable the
oscillator during stop mode.
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
7-2.)
DDA
SSA
DDA
pin to the same voltage potential as the V
SSA
carefully for maximum noise immunity and place bypass
)
carefully for maximum noise immunity and place bypass
)
DD
pin.
SS
pin.
Advance Information
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