mcf5307cft90b Freescale Semiconductor, Inc, mcf5307cft90b Datasheet - Page 202

• Manufacturer Part Number: mcf5307cft90b
• Description: Mcf5307 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

PLL Power Supply Filter Circuit
7.5 PLL Power Supply Filter Circuit
To ensure PLL stability, the power supply to the PLL power pin should be filtered using a
circuit similar to the one in Figure 7-5. The circuit should be placed as close as possible to
the PLL power pin to ensure maximum noise filtering.
7-6
(1/2 MODE)
(1/3 MODE)
(1/4 MODE)
PSTCLK
BCLKO
BCLKO
BCLKO
CLKIN
RSTO
D[7:0]
RSTI
Vdd
>80 CLKIN
Figure 7-5. PLL Power Supply Filter Circuit
Figure 7-4. Reset and Initialization Timing
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MCF5307 User’s Manual
D[7:0] latched
Cycle Lock Time
10 µF
100K CLKIN
0.1 µF
30 BCLKO
20 BCLKO
15 BCLKO
PLL power pin