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DSP56156ROM Datasheet(PDF) 74 Page - Motorola, Inc

Part # DSP56156ROM
Description  16-bit Digital Signal Processor
PDF  76 Pages
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

DSP56156ROM Datasheet(HTML) 74 Page - Motorola, Inc

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Design Considerations
MOTOROLA
DSP56156 Data Sheet
69
Figure 49 Four Possible Power Supply Connections
28
AUX
MIC
Ideal Choice
— Two separate power supplies.
Ground planes connected with a single trace as
close as possible to the VCCA pin on the codec.
Second Choice
— One power supply.
Two regulators, one for the digital supply, one for
the analog supply. Ground planes connected with
a 10 ¾ resistor as close as possible to the VCCA
pin on the codec.
10
Ω
Voltage
Regulator
BIAS
28
AUX
MIC
BIAS
Voltage
Regulator
Third Choice
— One power supply.
One regulator for the analog supply. Digital sup-
plies driven directly by voltage source. Ground
planes connected with a 10 ¾ resistor as close as
possible to the VCCA pin on the codec.
10
Ω
Fourth Choice
— One power supply. Ground
planes connected at source. Ground planes
connected with a 10 ¾ resistor as close as pos-
sible to the VCCA pin on the codec.
28
AUX
MIC
BIAS
10
Ω
28
AUX
MIC
BIAS
Voltage
Regulator
Analog I/O Considerations
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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