mpc8308 Freescale Semiconductor, Inc, mpc8308 Datasheet - Page 40

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

PCI Express
40
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
Table 35. Differential Receiver (RX) Input Specifications (continued)
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 1
T
T
V
Z
RX-IDLE-DET-DIFF
RX-EYE-MEDIAN-t
RX-HIGH-IMP-DC
RX-IDLE-DET-DIF
o-MAX-JITTER
Z
V
ENTERTIME
RL
RL
RX-DIFF-DC
RX-CM-ACp
Symbol
Z
RX-DIFF
RX-DC
Fp-p
RX-CM
-
Jitter is defined as the
measurement variation of
the crossing points
(V
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
-V
Measured at the package
pins of the Receiver
An unexpected Electrical
Idle (Vrx-diffp-p <
Vrx-idle-det-diffp-p) must
be recognized no longer
than
Trx-idle-det-diff-entertime
to signal an unexpected
idle condition.
PEACPCMRX
RXD-
RX-CM-DC
PEEIDT
RX-D+
PEDPPRX
RX-D-
|/2 - V
Comments
|
+ V
= 2*|V
= DC
= 0 V) in
RX-D-
RX-CM-DC
= |V
RX-D+
(avg)
|/2
RXD+
of
+
200 k
Min
15
80
40
65
—
—
—
6
Typical
100
50
—
—
—
—
—
—
—
Max
150
120
175
0.3
60
10
—
—
—
Freescale Semiconductor
Units
mV
mV
dB
dB
ms
UI
Ω
Ω
Ω
Notes
2, 3, 7
2, 5
—
—
4
6
2
4
5