ppc440epx-nta667t ETC-unknow, ppc440epx-nta667t Datasheet - Page 68

• Manufacturer Part Number: ppc440epx-nta667t
• Description: Mpu 440epx Risc 32-bit 0.13um 667mhz 1.8v/2.5v/3.3v 680-pin Tebga Tray
• Manufacturer: ETC-unknow

440EPx – PPC440EPx Embedded Processor
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.
68
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
+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
C – 0.1μF ceramic dielectric
+ 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
Revision 1.30 – February 27, 2009
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
Data Sheet
AMCC Proprietary
Unit
Unit
W
W
W
W
W
W
Notes
Notes
1
1
1
1
1
1