ppc440gr-3jb667cz Applied Micro Circuits Corporation (AMCC), ppc440gr-3jb667cz Datasheet - Page 64

• Manufacturer Part Number: ppc440gr-3jb667cz
• Description: Powerpc 440gr Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

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 used for the on-chip PLLs can be derived from the logic voltage, but must be filtered before entering the
PPC440GR. A separate filter, as shown below, is recommended for each voltage.
64
Notes:
1. T
• The filter should keep the AV
• All wire lengths of the filter circuit should be kept as short as possible to minimize coupling from other signals.
• AGND (SAGND) must be connected to the digital ground plane at the AV
• The impedance of the ferrite bead should be much greater than that of the capacitor at frequencies where noise is
2.5V (3.3V tolerant)
Revision 1.19 – May 07, 2008
Preliminary Data Sheet
1/PerClk - EBC and NAND flash interfaces.
1/EMCRXClk - MII mode
1/SMIIRefClk - SMII mode
1/USB2Clk - UTMI
1/TrcClk - instruction trace interface
1/IIC0Clk and 1/IIC1Clk - IIC interfaces
1/SPIClkOut - SPI
1/EMCRefclk - RMII mode
DD
mV.
expected.
CYC
3.3V LVTTL
Receiver
V
DD
and V
is the period of the bus clock.
DDR
PCI
DD
are below +0.4V) before a new power-up cycle is started.
L
AC Overshoot (V)
1.2*SOV
1.2*OV
GND
3.9
3.9
C
DD
DD
DD
-AGNC (SAGND-SAGND) compression/expansion due to noise less than +50
DC Overshoot (V)
AGND, SAGND
AV
SOV
OV
DD,
DD
DD
3.6
3.6
SAV
+ 0.5
+ 0.3
DD
L – SMT ferrite bead chip, Murata BLM21PG600SN1
C – 0.1
DC Undershoot (V)
440GR – PPC440GR Embedded Processor
μ
F ceramic
0
0
0
0
DD
(SAV
DD
AC Undershoot (V)
) capacitor.
-0.2*OV
-0.6
-0.6
-0.6
DD
0.1/MemClkOut
AMCC Proprietary
0.1/PCIClk
0.1*T
0.1*T
T
OS
CYC
CYC
1
1