ppc440ep Applied Micro Circuits Corporation (AMCC), ppc440ep Datasheet - Page 63

• Manufacturer Part Number: ppc440ep
• Description: Powerpc 440ep Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

Figure 4. Overshoot Waveform
Table 11. 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
PPC440EP. A Separate filter, as shown below, is recommended for each voltage.
AMCC Proprietary
440EP – PPC440EP Embedded Processor
Notes:
1. T
• The filter should keep the AV
2.5V (3.3V tolerant)
AC Undershoot (V)
DC Undershoot (V)
AC Overshoot (V)
DC Overshoot (V)
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.
CYC
3.3V LVTTL
Receiver
and V
is the period of the bus clock.
DDR
PCI
DD
are below +0.4V) before a new power-up cycle is started.
T
OS
AC Overshoot (V)
1.2*SOV
1.2*OV
3.9
3.9
DD
DD
DD
-AGND (SAGND-SAGND) compression/expansion due to noise less than +50
DC Overshoot (V)
SOV
OV
DD
DD
3.6
3.6
+ 0.5
+ 0.3
T
CYC
DC Undershoot (V)
T
0
0
0
0
OS
Revision 1.29 – May 07, 2008
AC Undershoot (V)
-0.2*OV
-0.6
-0.6
-0.6
Data Sheet
DD
0.1/MemClkOut
0.1/PCIClk
0.1*T
0.1*T
T
OS
CYC
CYC
1
1
63