Revision 1.31 – February 16, 2012
440EPx – PPC440EPx Embedded Processor
Data Sheet
Figure 4. Overshoot Waveform
AC Overshoot (V)
DC Overshoot (V)
T
CYC
DC Undershoot (V)
AC Undershoot (V)
T
T
OS
OS
Table 11. Overshoot and Undershoot
TOS
Receiver
3.3V LVTTL
AC Overshoot (V)
DC Overshoot (V)
DC Undershoot (V)
AC Undershoot (V)
1
1
3.9
3.6
0
-0.6
-0.6
0.1*TCYC
0.1*TCYC
2.5V (3.3V tolerant)
3.9
3.6
0
0
0
1.2*SOVDD
1.2*OVDD
SOVDD + 0.3
OVDD + 0.5
DDR
PCI
-0.6
0.1/MemClkOut
0.1/PCIClk
-0.2*OVDD
Notes:
1. T
is the period of the bus clock.
CYC
1/PerClk - EBC and NAND flash interfaces.
1/GMCRXClk - GMII and MII mode
1/SMIIRefClk - SMII mode
1/GMC0RxClk and 1/GMC1RxClk - RGMII mode
1/USB2Clk - UTMI
1/TrcClk - instruction trace interface
1/IIC0Clk and 1/IIC1Clk - IIC interfaces
1/SPIClkOut - SPI
68
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