MPC8640DEC datasheet(85/140 Pages) FREESCALE

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MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 1

Freescale Semiconductor

Serial RapidIO

15.7

Receiver Specifications

LP-Serial receiver electrical and timing specifications are stated in the text and tables of this section.

Receiver input impedance shall result in a differential return loss better that 10 dB and a common mode

return loss better than 6 dB from 100 MHz to (0.8)*(Baud Frequency). This includes contributions from

on-chip circuitry, the chip package and any off-chip components related to the receiver. AC coupling

components are included in this requirement. The reference impedance for return loss measurements is

100 Ohm resistive for differential return loss and 25 Ohm resistive for common mode.

Table 57. Transmitter Differential Output Eye Diagram Parameters

Transmitter Type

VDIFFmin

(mV)

VDIFFmax

(mV)

A (UI)

B (UI)

1.25 GBaud short range

250

500

0.175

0.39

1.25 GBaud long range

400

800

0.175

0.39

2.5 GBaud short range

250

500

0.175

0.39

2.5 GBaud long range

400

800

0.175

0.39

3.125 GBaud short range

250

500

0.175

0.39

3.125 GBaud long range

400

800

0.175

0.39

Table 58. Receiver AC Timing Specifications—1.25 GBaud

Characteristic

Symbol

Range

Unit

Notes

Min

Max

Differential Input Voltage

VIN

200

1600

mV p-p

Measured at receiver

Deterministic Jitter Tolerance

0.37

UI p-p

Measured at receiver

Combined Deterministic and Random

Jitter Tolerance

JDR

0.55

UI p-p

Measured at receiver

Total Jitter Tolerance1

0.65

UI p-p

Measured at receiver

Multiple Input Skew

SMI

Skew at the receiver input

between lanes of a multilane

link

Bit Error Rate

BER

10–12

Unit Interval

800

+/– 100 ppm

Note:

1. Total jitter is composed of three components, deterministic jitter, random jitter and single frequency sinusoidal jitter. The

sinusoidal jitter may have any amplitude and frequency in the unshaded region of Figure 55. The sinusoidal jitter component

is included to ensure margin for low frequency jitter, wander, noise, crosstalk and other variable system effects.

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