ppc440epx Applied Micro Circuits Corporation (AMCC), ppc440epx Datasheet - Page 69

• Manufacturer Part Number: ppc440epx
• Description: Powerpc 440epx Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

Revision 1.29 – July 22, 2008
Power Sequencing
Startup sequencing of the power supply voltages is not required. However, a power-down cycle must complete
(OV
Analog Voltage Filter
The analog voltages (AVdd, EAVdd, and UnAVdd) used for the on-chip PLLs can be derived from the logic voltage, but must be
filtered before the PPC440EPx. A Separate filter, as shown below, is recommended for each voltage.
AMCC Proprietary
Preliminary Data Sheet
Table 13. Typical DC Power Supply Requirements Using DDR2 Memory
Table 14. Typical DC Power Supply Requirements Using DDR1 Memory
• The filter should keep the analog voltage to analog ground compression/expansion due to noise less than +50
• Keep all wire lengths as short as possible.
• Analog grounds must be brought out and connected to the digital ground plane at the filter capacitor.
• The impedance of the ferrite bead should be much greater than that of the capacitor at frequencies where
Notes:
1. Typical power is measured and is based on a nominal voltage of V
Notes:
1. Typical power is measured and is based on a nominal voltage of V
Frequency (MHz)
Frequency (MHz)
DD
mV.
noise is expected.
that exercises each function with representative traffic.
that exercises each function with representative traffic.
V
DD
and V
400
533
667
400
533
667
DD
are below +0.4V) before a new power-up cycle is started.
L
(V
(V
DD
DD
+1.5V Supply
+1.5V Supply
+AV
+AV
GND
1.61
1.82
2.16
1.69
1.88
2.20
DD
DD
C
+EAV
+EAV
DD
DD
)
)
AGND, EAGND, UnAGND
AV
+1.8V Supply
+1.8V Supply
DD
(SOV
(SOV
, EAV
0.35
0.36
0.37
na
na
na
DD
DD
DD
)
)
, UnAVdd
DD
DD
(SOV
440EPx – PPC440EPx Embedded Processor
+2.5V Supply
+2.5V Supply
= +1.5V, T
= +1.5V, T
(EOV
DD
0.28
0.28
0.28
1.33
1.35
1.37
L – SMT ferrite bead chip, Murata
BLM21PG600SN1
+ EOV
DD
)
C
C
DD
= 100°C, while running Linux and a test application
= 100°C, while running Linux and a test application
)
(OV
(OV
+3.3V Supply
+3.3V Supply
DD
DD
+UAV
0.2
0.2
0.2
+UAV
0.2
0.2
0.2
DD
DD
)
)
Total
Total
2.44
2.66
3.01
3.22
3.43
3.77
Unit
Unit
W
W
W
W
W
W
Notes
Notes
1
1
1
1
1
1
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