MPC8548E Freescale, MPC8548E Datasheet - Page 70

• Manufacturer Part Number: MPC8548E
• Description: Integrated Processor
• Manufacturer: Freescale

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V
T
T
V
TX-CM-DC-LINE-DELTA
TX-IDLE-TO-DIFF-DATA
TX-IDLE-SET-TO-IDLE
V
TX-CM-DC-ACTIVE-
V
TX-RCV-DETECT
T
TX-IDLE-DIFFp
V
IDLE-DELTA
I
RL
TX-IDLE-MIN
TX-SHORT
RL
Symbol
TX-DC-CM
TX-DIFF
TX-CM
MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 4
Table 51. Differential Transmitter (TX) Output Specifications (continued)
Absolute delta of
Absolute delta of
to transition to a
differential peak
after leaving an
Common mode
voltage change
TX short circuit
mode between
common mode
The amount of
allowed during
Maximum time
Maximum time
output voltage
Minimum time
valid electrical
to transition to
during L0 and
mode voltage
Electrical idle
specifications
electrical idle
electrical idle
electrical idle
electrical idle
DC common
dc common
current limit
The TX DC
ordered set
Parameter
sending an
D+ and D–
Differential
return loss
return loss
detection
condition
idle after
valid TX
receiver
spent in
voltage
Min
50
12
—
—
—
—
0
0
0
0
6
Nom
—
—
—
—
—
—
—
—
—
—
—
Max
100
600
3.6
25
20
90
20
20
—
—
Unit
mV
mV
mV
mV
mA
dB
dB
UI
UI
UI
V
|V
electrical idle)
V
V
[electrical idle]
See Note 2.
|V
V
V
See Note 2.
V
<= 20 mV.
See Note 2.
The total amount of voltage change that a
transmitter can apply to sense whether a low
impedance receiver is present. See Note 6.
The allowed DC common mode voltage under any
conditions. See Note 6.
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 L0.
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
Measured over 50 MHz to 1.25 GHz.
See Note 4.
Measured over 50 MHz to 1.25 GHz.
See Note 4.
TX-CM-DC
TX-CM-Idle-DC
TX-CM-DC-D+
TX-CM-DC-D–
TX-IDLE-DIFFp
TX-CM-DC (during L0)
TX-CM-DC-D+
= DC
| <= 100 mV
= DC
= DC
= DC
– V
= |V
(avg)
TX-CM-DC-D–
(avg)
Comments
TX-IDLE-D+
(avg)
(avg)
+ V
of |V
of |V
of |V
TX-CM-Idle-DC (during
of |V
Freescale Semiconductor
TX-D+
TX-D–
TX-D+
TX-D+
– V
| <= 25 mV
+ V
TX-IDLE-D–
|.
|
TX-D–
+ V
TX-D–
|/2 [L0]
|
|/2