mpc8378e Freescale Semiconductor, Inc, mpc8378e Datasheet - Page 72

• Manufacturer Part Number: mpc8378e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Minimum receiver eye
width
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
PCI Express
72
Parameter
Table 58. Differential Receiver (Rx) Input Specifications (continued)
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
The maximum interconnect
media and transmitter jitter that
can be tolerated by the receiver
can be derived as
T
U
Jitter is defined as the
measurement variation of the
crossing points (V
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.
V
V
V
– V
Measured over 50 MHz to 1.25
GHz with the D+ and D– lines
biased at +300 mV and –300
mV, respectively.
Measured over 50 MHz to 1.25
GHz with the D+ and D– lines
biased at 0 V.
RX DC differential mode
impedance.
Required RX D+ as well as D-
DC impedance (50 ± 20%
tolerance).
Required RX D+ as well as D–
DC impedance when the
receiver terminations do not
have power.
V
Measured at the package pins
of the receiver
RX-MAX-JITTER
PEACPCMRX
RXD-
RX-CM-DC
PEEIDT
PEEWRX
RX-D-
|/2 – V
|/2
= 2 × |V
= 0.6 UI.
Comments
= DC
RX-CM-DC
= |V
= 1 –
(avg)
RX-D+
RXD+
PEDPPRX
of |V
-V
–
RX-D-
RX-D+
= 0
|
T
V
Z
RX-EYE-MEDIAN-to
RX-IDLE-DET-DIFF
RX-HIGH-IMP-DC
Z
V
-MAX-JITTER
RL
RL
RX-DIFF-DC
RX-CM-ACp
Symbol
T
Z
RX-EYE
RX-DIFF
RX-DC
RX-CM
p-p
200 k
Min
0.4
10
80
40
65
—
—
6
Typical
100
50
—
—
—
—
—
—
—
Max
150
120
175
Freescale Semiconductor
0.3
—
—
—
60
—
Units
mV
mV
dB
dB
UI
UI
Ω
Ω
Ω
Notes
2, 3, 7
2, 3
2, 5
—
2
4
4
5
6