dsp56167 Freescale Semiconductor, Inc, dsp56167 Datasheet - Page 85

• Manufacturer Part Number: dsp56167
• Description: Advance Information 16-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
Regulator
Voltage
10
Figure 4-6 Four Possible Power Supply Connections
Third Choice—
One power supply.
One regulator for the
analog supply. Digital
supplies driven
directly by voltage
source. Ground
planes connected
with a 10
as close as possible
to the V
codec.
Ideal Choice—
Two separate power
supplies, one for
digital and one for
analog. Ground
planes connected
with a single trace as
close as possible to
the V
codec.
DDA
DDA
on the
resistor
on the
28
28
DSP56167/D, Rev. 1
VRAD
VRAD
MIC
MIC
AUX
AUX
Regulator
Voltage
10
10
Regulator
Voltage
Analog I/O Considerations
Fourth Choice—
One power supply.
Ground planes
connected at source.
Ground planes
connected with a
10
close as possible to
the V
codec.
Design Considerations
Second Choice—
One power supply,
two regulators, one
for digital and one for
analog. Ground
planes connected
with a
10
close as possible to
the V
codec.
DDA
resistor as
DDA
resistor as
on the
on the
28
28
VRAD
MIC
AUX
VRAD
MIC
AUX
4-9