PCI Express
Figure 55. Minimum Transmitter Timing and Voltage Output Compliance Specifications
16.4.3 Differential Receiver (RX) Input Specifications
Table 62 defines the specifications for the differential input at all receivers (RXs). The parameters are
specified at the component pins.
Table 62. Differential Receiver (RX) Input Specifications
Symbol
Parameter
Min Nominal
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.
V
Differential Input 0.175
Peak-to-Peak
Voltage
—
1.200
—
V
V
= 2*|V
- V
|
RX-D-
RX-DIFFp-p
RX-DIFFp-p
RX-D+
See Note 2.
T
Minimum
Receiver Eye
Width
0.4
—
UI
The maximum interconnect media and
Transmitter jitter that can be tolerated by the
Receiver can be derived as T
RX-EYE
RX-MAX-JITTER
= 1 - T
= 0.6 UI.
RX-EYE
See Notes 2 and 3.
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
86
FREESCALE [ Freescale ]
