mpc8544e Freescale Semiconductor, Inc, mpc8544e Datasheet - Page 78

• Manufacturer Part Number: mpc8544e
• Description: Mpc8544e Powerquicc Iii Integrated Processor
• Manufacturer: Freescale Semiconductor, Inc

PCI Express
78
T
-JITTER
V
RL
RL
Z
Z
Z
V
T
ENTERTIME
RX-EYE-MEDIAN-to-MAX
RX-DIFF-DC
RX-DC
RX-HIGH-IMP-DC
RX-IDLE-DET-DIFF-
RX-CM-ACp
RX-IDLE-DET-DIFFp-p
RX-DIFF
RX-CM
Symbol
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
Table 60. Differential Receiver (RX) Input Specifications (continued)
Maximum time
between the jitter
median and
maximum deviation
from the median
AC peak common
mode input voltage
Differential return
loss
Common mode
return loss
DC differential input
impedance
DC input impedance
Powered down DC
input impedance
Electrical idle detect
threshold
Unexpected
electrical idle enter
detect threshold
integration time
Parameter
Preliminary—Subject to Change Without Notice
Freescale Confidential Proprietary
200 k
Min
15
80
40
65
—
—
—
6
Nom
100
50
—
—
—
—
—
—
—
Max
175
150
120
0.3
60
10
—
—
—
Units
mV
mV
ms
dB
dB
UI
Ω
Ω
Ω
Jitter is defined as the measurement
variation of the crossing points (V
= 0 V) in relation to a recovered TX UI. A
recovered TX UI is calculated over 3500
consecutive unit intervals of sample data.
Jitter is measured using all edges of the 250
consecutive UI in the center of the 3500 UI
used for calculating the TX UI. See Notes 2,
3, and 7.
V
V
V
See Note 2.
Measured over 50 MHz to 1.25 GHz with the
D+ and D– lines biased at +300 and
–300 mV, respectively. See Note 4.
Measured over 50 MHz to 1.25 GHz with the
D+ and D– lines biased at 0 V. See Note 4.
RX DC differential mode impedance. See
Note 5.
Required RX D+ as well as D– DC
impedance (50 ± 20% tolerance).
See Notes 2 and 5.
Required RX D+ as well as D– DC
impedance when the receiver terminations
do not have power. See Note 6.
V
Measured at the package pins of the
receiver.
An unexpected electrical idle (V
< V
no longer than T
signal an unexpected idle condition.
RX-CM-ACp
RX-CM-DC
RX-CM-DC
RX-IDLE-DET-DIFFp-p
RX-IDLE-DET-DIFFp-p
= DC
= |V
RX-IDLE-DET-DIFF-ENTERING
RXD+
Comments
(avg)
Freescale Semiconductor
= 2 × |V
of |V
– V
) must be recognized
RXD–
RX-D+
RX-D+
| ÷ 2 –
RX-DIFFp-p
– V
RX-DIFFp-p
– V
RX-D–
RX-D–
|/2
to
|