PCI/PCI-X
2
Figure 29 provides the AC test load for the I C.
Output
Z = 50 Ω
0
OV /2
DD
R = 50 Ω
L
2
Figure 33. I C AC Test Load
2
Figure 34 shows the AC timing diagram for the I C bus.
SDA
SCL
t
t
t
t
I2CF
I2CF
I2DVKH
I2KHKL
t
t
t
I2CR
I2CL
I2SXKL
t
t
t
t
I2PVKH
I2SXKL
I2CH
I2SVKH
t
t
I2DXKL, I2OVKL
S
Sr
P
S
2
Figure 34. I C Bus AC Timing Diagram
14 PCI/PCI-X
This section describes the DC and AC electrical specifications for the PCI/PCI-X bus of the MPC8548E.
Note that the maximum PCI-X frequency in synchronous mode is 110 MHz.
14.1 PCI/PCI-X DC Electrical Characteristics
Table 47 provides the DC electrical characteristics for the PCI/PCI-X interface.
1
Table 47. PCI/PCI-X DC Electrical Characteristics
Parameter
High-level input voltage
Symbol
Min
Max
Unit
Notes
V
2
–0.3
—
OV + 0.3
V
V
—
—
2
IH
DD
Low-level input voltage
V
I
0.8
±5
—
IL
Input current (V = 0 V or V = V
)
μA
V
IN
IN
DD
IN
High-level output voltage (OV = min, I = –2 mA)
V
OH
2.4
—
—
—
DD
OH
Low-level output voltage (OV = min, I = 2 mA)
V
OL
0.4
V
DD
OL
Notes:
1. Ranges listed do not meet the full range of the DC specifications of the PCI 2.2 Local Bus Specifications.
2. Note that the symbol V , in this case, represents the OV symbol referenced in Table 1 and Table 2.
IN
IN
MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 6
Freescale Semiconductor
56
FREESCALE [ Freescale ]
