mpc8378 Freescale Semiconductor, Inc, mpc8378 Datasheet - Page 63

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mpc8378

Manufacturer Part Number
mpc8378
Description
Powerquicc Ii Pro Processor
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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Freescale Semiconductor
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
Maximum time to
transition to a valid
electrical idle after
sending an electrical
idle ordered set
Maximum time to
transition to valid Tx
specifications after
leaving an electrical idle
condition
Differential return loss
Parameter
Table 52. Differential Transmitter (Tx) Output Specifications (continued)
MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
|V
≤ 25 mV
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.
After sending an electrical idle
ordered set, the transmitter
must meet all electrical idle
specifications within this time.
This is considered a
debounce time for the
transmitter to meet electrical
idle after transitioning from
LO.
Maximum time to meet all Tx
specifications when
transitioning from electrical
idle to sending differential
data. This is considered a
debounce time for the Tx to
meet all Tx specifications after
leaving electrical idle
1.25 GHz.
Measured over 50 MHz to
TX-CM-DC-D+
TX-CM-DC-D-
PEEIDPTX
TX-CM-DC-D+
TX-D+
TX-D-
TX-IDLE-D-
|
|
Conditions
= |V
| ≤ 20 mV
= DC
= DC
– V
TX-IDLE-D+
TX-CM-DC-D-
(avg)
(avg)
of
of
|
T
T
TX-IDLE-TO-DIFF-DATA
TX-IDLE-SET-TO-IDLE
V
V
V
TX-RCV-DETECT
TX-CM-DC-LINE-
T
TX-IDLE-DIFFp
V
I
RL
TX-IDLE-MIN
TX-SHORT
Symbol
TX-DC-CM
DELTA
TX-DIFF
Min
50
12
0
0
0
XPADV
XPADV
Typical
DD
DD
/2
/2
Max
600
25
20
90
20
20
Units
mV
mV
mV
mA
dB
UI
UI
UI
V
PCI Express
Notes
2
2
6
6
4
63

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