参数资料
型号: MPC8536EAVTANGA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 800 MHz, MICROPROCESSOR, PBGA783
封装: 29 X 29 MM, 2.80 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, FCBGA-783
文件页数: 6/127页
文件大小: 1893K
代理商: MPC8536EAVTANGA
2.21.4.2
Transmitter Compliance Eye Diagrams
The TX eye diagram in Figure 69 is specified using the passive compliance/test measurement load (see Figure 71) in place of
any real PCI Express interconnect + RX component.
There are two eye diagrams that must be met for the transmitter. Both eye diagrams must be aligned in time using the jitter
median to locate the center of the eye diagram. The different eye diagrams will differ in voltage depending whether it is a
transition bit or a de-emphasized bit. The exact reduced voltage level of the de-emphasized bit will always be 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 is 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 69. Minimum Transmitter Timing and Voltage Output Compliance Specifications
2.21.4.3
Differential Receiver (RX) Input Specifications
Table 72 defines the specifications for the differential input at all receivers (RXs). The parameters are specified at the
component pins.
Table 72. Differential Receiver (RX) Input Specifications
Symbol
Parameter
Min
Nom
Max
Units
Comments
UI
Unit Interval
399.8
8
400
400.12
ps
Each UI is 400 ps ± 300 ppm. UI does not
account for Spread Spectrum Clock dictated
variations. See Note 1.
VRX-DIFFp-p
Differential
Peak-to-Peak
Output Voltage
0.175
1.200
V
VRX-DIFFp-p = 2*|VRX-D+ – VRX-D-|
See Note 2.
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