mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 236

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

PLL Power Supply Filter Circuit
50K CLKIN
>16 CLKS
>10 CLKS
Cycle Lock Time
CLKIN
BCLKO
PSTCLK
RSTI
D[7:0]
D[7:0] latched on rising edge of CLKIN
RSTO
Figure 7-4. Reset and Initialization Timing
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.
10 Ω
Vdd
PLL power pin
10 µF
0.1 µF
Figure 7-5. PLL Power Supply Filter Circuit
MCF5407 User’s Manual
7-6