PCI
14 PCI
This section describes the DC and AC electrical specifications for the PCI bus of the MPC8378E.
14.1
PCI DC Electrical Characteristics
provides the DC electrical characteristics for the PCI interface of the device. The DC
characteristics of the PORESET signal, which can be used as PCI RST in applications where the device is
a PCI agent, deviates from the standard PCI levels.
Table 52. PCI DC Electrical Characteristics
Parameter
High-level input voltage
Low-level input voltage
High-level output voltage
Low-level output voltage
Input current
Condition
V
OUT
≥
V
OH
(min) or
V
OUT
≤
V
OL
(max)
I
OH
= –500
μA
I
OL
= 1500
μA
0 V
≤
V
IN
≤
OV
DD
Symbol
V
IH
V
IL
V
OH
V
OL
I
IN
Min
0.5
×
OV
DD
–0.5
0.9
×
OV
DD
—
—
Max
OV
DD
+ 0.5
0.3
×
OV
DD
—
0.1
×
OV
DD
± 30
Unit
V
V
V
V
μA
Note:
• The symbol V
IN
, in this case, represents the OV
IN
symbol referenced in
14.2
PCI AC Electrical Specifications
This section describes the general AC timing parameters of the PCI bus of the device. Note that the
PCI_CLK/PCI_SYNC_IN or CLKIN signal is used as the PCI input clock depending on whether the
MPC8378E is configured as a host or agent device. CLKIN is used when the device is in host mode.
shows the PCI AC timing specifications at 66 MHz.
.
Table 53. PCI AC Timing Specifications at 66 MHz
Parameter
Symbol
t
PCKHOV
t
PCKHOX
t
PCKHOZ
t
PCIVKH
Min
—
1
—
3.0
Max
6.0
—
14
—
Unit
ns
ns
ns
ns
Notes
PCI_SYNC_IN clock input levels are with next levels: VIL = 0.1
×
OV
DD
, VIH = 0.7
×
OV
DD
.
Clock to output valid
Output hold from Clock
Clock to output high impedance
Input setup to Clock
MPC8378E PowerQUICC
™
II Pro Processor Hardware Specifications, Rev. 2
62
Freescale Semiconductor
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
