參數(shù)資料
型號： MPC8308VMAGDA
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： RISC MICROCONTROLLER, PBGA473
封裝： 19 X 19 MM, 1.39 MM HEIGHT, 0.80 MM PITCH, LEAD FREE, PLASTIC, MABGA-473
文件頁數(shù)： 36/90頁
文件大?。?/td> 1123K
代理商： MPC8308VMAGDA
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 2
Freescale Semiconductor
41
PCI Express
Maximum time between
the jitter median and
maximum deviation from
the median.
TRX-EYE-MEDIAN-t
o-MAX-JITTER
Jitter is defined as the
measurement variation of
the crossing points
(VPEDPPRX = 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.
—
0.3
UI
2, 3, 7
AC peak common mode
input voltage
VRX-CM-ACp
VPEACPCMRX = |VRXD+ +
VRXD-|/2 - VRX-CM-DC
VRX-CM-DC = DC(avg) of
|VRX-D+ + VRX-D-|/2
——
150
mV
2
Differential return loss
RLRX-DIFF
Measured over 50 MHz to
1.25 GHz with the D+ and
D- lines biased at +300
mV and -300 mV,
respectively.
15
—
dB
4
Common mode return
loss
RLRX-CM
Measured over 50 MHz to
1.25 GHz with the D+ and
D- lines biased at 0 V.
6—
—
dB
4
DC differential input
impedance
ZRX-DIFF-DC
RX DC differential mode
impedance.
80
100
120
Ω
5
DC Input Impedance
ZRX-DC
Required RX D+ as well
as D- DC Impedance (50
± 20% tolerance).
40
50
60
Ω
2, 5
Powered down DC input
impedance
ZRX-HIGH-IMP-DC Required RX D+ as well
as D- DC Impedance
when the Receiver
terminations do not have
power.
200 k
—
Ω
6
Electrical idle detect
threshold
VRX-IDLE-DET-DIF
Fp-p
VPEEIDT = 2*|VRX-D+
-VRX-D-|
Measured at the package
pins of the Receiver
65
—
175
mV
—
Unexpected Electrical Idle
Enter Detect Threshold
Integration Time
TRX-IDLE-DET-DIFF
-
ENTERTIME
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.
——
10
ms
—
Table 35. Differential Receiver (RX) Input Specifications (continued)
Parameter
Symbol
Comments
Min
Typical
Max
Units
Notes
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