Local Bus
Figure 21 shows the MII management AC timing diagram.
t
t
MDCR
MDC
MDC
t
t
MDCF
MDCH
MDIO
(Input)
t
MDDVKH
t
MDDXKH
MDIO
(Output)
t
MDKHDX
Figure 21. MII Management Interface Timing Diagram
10 Local Bus
This section describes the DC and AC electrical specifications for the local bus interface of the
MPC8548E.
10.1 Local Bus DC Electrical Characteristics
Table 38 provides the DC electrical characteristics for the local bus interface operating at BV
3.3 V DC.
=
DD
Table 38. Local Bus DC Electrical Characteristics (3.3 V DC)
Parameter
Symbol
Min
Max
Unit
High-level input voltage
V
2
–0.3
—
BV + 0.3
V
V
IH
DD
Low-level input voltage
V
I
0.8
±5
—
IL
1
Input current (V
= 0 V or V = BV
)
μA
V
IN
IN
DD
IN
High-level output voltage (BV = min, I = –2 mA)
V
OH
2.4
—
DD
OH
Low-level output voltage (BV = min, I = 2 mA)
V
OL
0.4
V
DD
OL
Note:
1. Note that the symbol V , in this case, represents the BV symbol referenced in Table 1 and Table 2.
IN
IN
MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 6
Freescale Semiconductor
41
FREESCALE [ Freescale ]
