MPC8315ECVRAGDA datasheet(68/112 Pages) FREESCALE

68 / 112 page

MPC8315E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 0

Freescale Semiconductor

PCI Express

Maximum time between

the jitter median and

maximum deviation from

the median.

TRX-EYE-MEDIAN-to-MAX

-JITTER

Jitter is defined as the

measurement variation of the

crossing points (VRX-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.

—

0.3

2, 3, 7

AC peak common mode

input voltage

VRX-CM-ACp

VRX-CM-ACp = |VRXD+ +

VRXD-|/2 - VRX-CM-DC

VRX-CM-DC = DC(avg) of

|VRX-D+ + VRX-D-|/2

——

150

Differential return loss

RLRX-DIFF

Measured over 50 MHz to

1.25 GHz with the D+ and D-

lines biased at +300 mV and

-300 mV, respectively.

—

Common mode return

loss

RLRX-CM

Measured over 50 MHz to

1.25 GHz with the D+ and D-

lines biased at 0 V.

6—

—

DC differential input

impedance

ZRX-DIFF-DC

RX DC differential mode

impedance.

100

120

DC Input Impedance

ZRX-DC

Required RX D+ as well as D-

DC Impedance (50 ± 20%

tolerance).

2, 5

Powered down DC input

impedance

ZRX-HIGH-IMP-DC

Required RX D+ as well as D-

DC Impedance when the

Receiver terminations do not

have power.

200 k

—

Electrical idle detect

threshold

VRX-IDLE-DET-DIFFp-p VPEEIDT = 2*|VRX-D+ -VRX-D-|

Measured at the package pins

of the Receiver

—

175

—

Unexpected Electrical Idle

Enter Detect Threshold

Integration Time

TRX-IDLE-DET-DIFF-

ENTERTIME

An unexpected Electrical Idle

(Vrx-diffp-p <

Vrx-idle-det-diffp-p) must be

recognized no longer than

Trx-idle-det-diff-entertime to

signal an unexpected idle

condition.

——

—

Table 55. Differential Receiver (RX) Input Specifications (continued)

Parameter

Symbol

Comments

Min

Typical

Max

Units

Notes

MPC8315ECVRAGDA Datasheet(PDF) 68 Page - Freescale Semiconductor, Inc

MPC8315ECVRAGDA Datasheet(HTML) 68 Page - Freescale Semiconductor, Inc

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