参数资料
型号: MPC8377EVRAGDA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 266 MHz, MICROPROCESSOR, PBGA689
封装: 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689
文件页数: 85/124页
文件大小: 1462K
代理商: MPC8377EVRAGDA
MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
63
PCI Express
transition bit or a de-emphasized bit. The exact reduced voltage level of the de-emphasized bit is always
relative to the transition bit.
The eye diagram must be valid for any 250 consecutive UIs.
A recovered Tx UI is calculated over 3500 consecutive unit intervals of sample data. The eye diagram is
created using all edges of the 250 consecutive UI in the center of the 3500 UI used for calculating the Tx
UI.
NOTE
It is recommended that the recovered Tx UI be calculated using all edges in
the 3500 consecutive UI interval with a fit algorithm using a minimization
merit function (that is, least squares and median deviation fits).
Figure 42. Minimum Transmitter Timing and Voltage Output Compliance Specifications
15.4.3
Differential Receiver (Rx) Input Specifications
Table 52 defines the specifications for the differential input at all receivers. The parameters are specified
at the component pins.
Table 52. Differential Receiver (Rx) Input Specifications
Parameter
Comments
Symbol
Min
Typical
Max
Units
Notes
Unit interval
Each UPERX is 400 ps ± 300
ppm. UPERX does not account
for Spread Spectrum Clock
dictated variations.
UI
399.88
400
400.12
ps
Differential peak-to-peak
output voltage
VPEDPPRX = 2 × |VRX-D+
VRX-D-|
VRX-DIFFp-p
0.175
1.200
V
[De-emphasized Bit]
566 mV (3 dB) >= VTX-DIFFp-p-MIN >= 505 mV (4 dB)
[Transition Bit]
VTX-DIFFp-p-MIN = 800 mV
[Transition Bit]
VTX-DIFFp-p-MIN = 800 mV
0.7 UI = UI – 0.3 UI(JTX-TOTAL-MAX)
VTX-DIFF = 0 mV
(D+ D– Crossing Point)
VTX-DIFF = 0 mV
(D+ D– Crossing Point)
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