DSP56156 Motorola Inc, DSP56156 Datasheet - Page 74
DSP56156
Manufacturer Part Number
DSP56156
Description
16-bit Digital Signal Processor
Manufacturer
Motorola Inc
Datasheet
1.DSP56156.pdf
(76 pages)
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Third Choice —
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 V
Ideal Choice —
Ground planes connected with a single trace as
close as possible to the V
MOTOROLA
CCA
Two separate power supplies.
One power supply.
pin
Voltage
Regulator
Figure 49 Four Possible Power Supply Connections
Freescale Semiconductor, Inc.
on
10
CCA
For More Information On This Product,
the codec.
BIAS
BIAS
pin on the codec.
AUX
AUX
28
28
MIC
MIC
Go to: www.freescale.com
DSP56156 Data Sheet
Second Choice —
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 V
pin on the codec.
Fourth Choice —
planes connected at source. Ground planes
connected with a 10 ¾ resistor as close as pos-
sible to the V
Voltage
Regulator
CCA
pin on the codec.
One power supply. Ground
One power supply.
Voltage
Regulator
10
10
BIAS
BIAS
AUX
AUX
28
MIC
MIC
28
Analog I/O Considerations
Design Considerations
CCA
69
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