PPC440EPX-NPAFFFTS AMCC [Applied Micro Circuits Corporation], PPC440EPX-NPAFFFTS Datasheet - Page 69
PPC440EPX-NPAFFFTS
Manufacturer Part Number
PPC440EPX-NPAFFFTS
Description
PowerPC 440EPx Embedded Processor
Manufacturer
AMCC [Applied Micro Circuits Corporation]
Datasheet
1.PPC440EPX-NPAFFFTS.pdf
(94 pages)
- Current page: 69 of 94
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Revision 1.26 – October 15, 2007
Table 12. Overshoot and Undershoot
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
Notes:
1. T
• 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
2.5V (3.3V tolerant)
1/PerClk - EBC and NAND flash interfaces.
1/GMCRXClk - GMII and MII modes
1/SMIIRefClk - SMII mode
1/GMCGRXClk - RGMII mode
1/USB2Clk - UTMI
1/TrcClk - instruction trace interface
1/IIC0Clk and 1/IIC1Clk - IIC interfaces
1/SPIClkOut - SPI
DD
mV.
noise is expected.
CYC
3.3V LVTTL
V
Receiver
DD
and V
is the period of the bus clock.
DDR
PCI
DD
are below +0.4 V) before a new power-up cycle is started.
L
AC Overshoot (V)
1.2*SOV
GND
1.2*OV
3.9
3.9
C
DD
DD
DC Overshoot (V)
AGND, SAGND, UnAGND
AV
SOV
OV
DD
, SAV
DD
DD
3.6
3.6
+ 0.5
+ 0.3
DD
, UnAVdd
440EPx – PPC440EPx Embedded Processor
DC Undershoot (V)
-0.16
-0.16
L – SMT ferrite bead chip, Murata
BLM21PG600SN1
-0.3
-0.5
AC Undershoot (V)
-0.2*OV
-0.6
-0.6
-0.6
DD
0.1/MemClkOut
0.1/PCIClk
0.1*T
0.1*T
T
OS
CYC
CYC
1
1
69
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