mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 139

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

8.9.3 Choosing a Filter
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
As described in
external filter network is critical to the stability and reaction time of the
PLL. The PLL is also dependent on reference frequency and supply
voltage.
Either of the filter networks in
a 32.768kHz reference clock (CGMRCLK).
applications requiring better stability.
applications where stability is not critical.
Clock Generator Module (CGM)
0.033 µF
8.9.2 Parametric Influences on Reaction
10 kΩ
CGMXFC
(a)
Figure 8-10. PLL Filter
V
SSA
Figure 8-10
0.01 µF
Figure 8-10
Acquisition/Lock Time Specifications
is recommended when using
Figure 8-10
Clock Generator Module (CGM)
CGMXFC
V
SSA
(b)
(b) is used in low-cost
0.47 µF
(a) is used for
Time, the
Data Sheet
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