參數(shù)資料
型號: MPC8544VTARJ
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 533 MHz, MICROPROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件頁數(shù): 78/112頁
文件大?。?/td> 1294K
代理商: MPC8544VTARJ
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 0
68
Freescale Semiconductor
PCI Express
Table 59. Differential Transmitter (TX) Output Specifications
Symbol
Parameter
Min
Nom
Max
Units
Comments
UI
Unit interval
399.88
400
400.12
ps
Each UI is 400 ps ± 300 ppm. UI does not
account for Spread Spectrum Clock
dictated variations. See Note 1.
VTX-DIFFp-p
Differential peak-to-
peak output voltage
0.8
1.2
V
VTX-DIFFp-p = 2*|VTX-D+ – VTX-D–|.
See Note 2.
VTX-DE-RATIO
De- emphasized
differential output
voltage (ratio)
–3.0
–3.5
–4.0
dB
Ratio of the VTX-DIFFp-p of the second and
following bits after a transition divided by
the VTX-DIFFp-p of the first bit after a
transition. See Note 2.
TTX-EYE
Minimum TX eye width
0.70
UI
The maximum transmitter jitter can be
derived as TTX-MAX-JITTER = 1 – TTX-EYE
= 0.3 UI. See Notes 2 and 3.
TTX-EYE-MEDIAN-to-
MAX-JITTER
Maximum time
between the jitter
median and maximum
deviation from the
median.
0.15
UI
Jitter is defined as the measurement
variation of the crossing points (VTX-DIFFp-p
= 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 and 3.
TTX-RISE, TTX-FALL
D+/D– TX output
rise/fall time
0.125
UI
See Notes 2 and 5.
VTX-CM-ACp
RMS AC peak
common mode output
voltage
20
mV
VTX-CM-ACp = RMS(|VTXD+
VTXD–|/2 – VTX-CM-DC)
VTX-CM-DC = DC(avg) of |VTX-D+
VTX-D–|/2
See Note 2.
VTX-CM-DC-ACTIVE-
IDLE-DELTA
Absolute delta of DC
common mode voltage
during LO and
electrical idle
0100
mV
|VTX-CM-DC (during LO) – VTX-CM-Idle-DC
(During Electrical Idle)|<= 100 mV
VTX-CM-DC = DC(avg) of |VTX-D+
VTX-D–|/2 [LO]
VTX-CM-Idle-DC = DC(avg) of |VTX-D+
VTX-D–|/2 [Electrical Idle]
See Note 2.
VTX-CM-DC-LINE-DELTA Absolute delta of DC
common mode
between D+ and D–
025
mV
|VTX-CM-DC-D+ – VTX-CM-DC-D–| <= 25 mV
VTX-CM-DC-D+ = DC(avg) of |VTX-D+|
VTX-CM-DC-D– = DC(avg) of |VTX-D–|
See Note 2.
VTX-IDLE-DIFFp
Electrical idle
differential peak output
voltage
020
mV
VTX-IDLE-DIFFp = |VTX-IDLE-D+ – VTX-IDLE-D–|
<= 20 mV
See Note 2.
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