mpc8308 Freescale Semiconductor, Inc, mpc8308 Datasheet - Page 36

• Manufacturer Part Number: mpc8308
• Description: Mpc8308 Powerquicc Ii Pro Processor Hardware Specification
• Manufacturer: Freescale Semiconductor, Inc

PCI Express
36
D+/D- TX output rise/fall
time
RMS AC peak common
mode output voltage
Absolute delta of DC
common mode voltage
during L0 and electrical
idle
Absolute delta of DC
common mode between
D+ and D–
Electrical idle differential
peak output voltage
Amount of voltage change
allowed during receiver
detection
TX DC common mode
voltage
TX short circuit current
limit
Minimum time spent in
electrical idle
Parameter
Table 34. Differential Transmitter (TX) Output Specifications (continued)
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 1
V
V
V
TX-RCV-DETECT
TX-CM-DC-LINE-
T
V
V
TX-IDLE-DIFFp
V
IDLE-DELTA
I
TX-IDLE-MIN
T
T
TX-SHORT
Symbol
TX-CM-ACp
TX-CM-DC-
TX-DC-CM
ACTIVE-
TX-RISE
TX-FALL
DELTA
,
V
RMS(|V
V
V
|V
|V
V
Electrical Idle)
V
|V
V
|V
[Electrical Idle]
|V
V
V
|V
V
|V
V
-V
The total amount of
voltage change that a
transmitter can apply to
sense whether a low
impedance Receiver is
present.
The allowed DC Common
Mode voltage under any
conditions.
The total current the
Transmitter can provide
when shorted to its ground
Minimum time a
Transmitter must be in
Electrical Idle Utilized by
the Receiver to start
looking for an Electrical
Idle Exit after successfully
receiving an Electrical Idle
ordered set
PEACPCMTX
TX-CM-DC
TX-CM-DC
TX-CM-Idle-DC (During
TX-CM-DC
TX-CM-Idle-DC
TX-CM-DC-D-
TX-CM-DC-D+
TX-CM-DC-D-
PEEIDPTX
TX-D+
TX-CM-DC (during L0)
TX-D+
TX-D+
TX-CM-DC-D+
TX-D+
TX-D-
TX-IDLE-D-
|
Comments
|
TXD+
+ V
+ V
+ V
)
= DC
= DC
= |V
TX-D-
|<=100 mV
TX-D-
TX-D-
| <= 20 mV
—
| <= 25 mV
=
+ V
= DC
= DC
= DC
-
TX-IDLE-D+
(avg)
(avg)
|/2
|/2 [L0]
|/2
TXD-
(avg)
(avg)
(avg)
-
|/2 -
of
of
of
of
of
0.125
Min
50
—
—
—
—
0
0
0
Typical
600
3.6
—
—
—
—
—
—
—
Max
100
20
25
20
90
—
—
—
—
Freescale Semiconductor
Units
mV
mV
mV
mV
mV
mA
UI
UI
V
Notes
2, 5
—
—
2
2
2
6
6
2