MPC8535E datasheet(100/126 Pages) FREESCALE

100 / 126 page

MPC8535E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 3

PCI Express

Freescale Semiconductor

100

VTX-DE-RATIO

De- Emphasized

Differential Output

Voltage (Ratio)

–3.0

–3.5

–4.0

Ratio of the VTX-DIFFp-p of the second and following

bits after a transition divided by the VTX-DIFFp-p of the

first bit after a transition. See Note 2.

TTX-EYE

Minimum TX Eye

Width

0.70

—

The maximum Transmitter jitter can be derived as

TTX-MAX-JITTER = 1 – TTX-EYE= 0.3 UI.

See Notes 2 and 3.

TTX-EYE-MEDIAN-to-

MAX-JITTER

Maximum time

between the jitter

median and

maximum

deviation from the

median.

—

0.15

Jitter is defined as the measurement variation of the

crossing points (VTX-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. See Notes 2 and 3.

TTX-RISE, TTX-FALL

D+/D- TX Output

Rise/Fall Time

0.125

—

See Notes 2 and 5

VTX-CM-ACp

RMS AC Peak

Common Mode

Output Voltage

——

VTX-CM-ACp = RMS(|VTXD+ +VTXD-|/2 – VTX-CM-DC)

VTX-CM-DC = DC(avg) of |VTX-D+ +VTX-D-|/2

See Note 2

VTX-CM-DC-ACTIVE-

IDLE-DELTA

Absolute Delta of

DC Common

Mode Voltage

During L0 and

Electrical Idle

—

100

|VTX-CM-DC (during L0) – VTX-CM-Idle-DC (During Electrical

Idle)|<=100 mV

VTX-CM-DC = DC(avg) of |VTX-D+ +VTX-D-|/2 [L0]

VTX-CM-Idle-DC = DC(avg) of |VTX-D+ + VTX-D-|/2

[Electrical Idle]

See Note 2.

VTX-CM-DC-LINE-DELTA Absolute Delta of

DC Common

Mode between D+

and D–

0—

|VTX-CM-DC-D+ – VTX-CM-DC-D-| <= 25 mV

VTX-CM-DC-D+ = DC(avg) of |VTX-D+|

VTX-CM-DC-D- = DC(avg) of |VTX-D-|

See Note 2.

VTX-IDLE-DIFFp

Electrical Idle

differential Peak

Output Voltage

0—

VTX-IDLE-DIFFp = |VTX-IDLE-D+ -VTX-IDLE-D-| <= 20 mV

See Note 2.

VTX-RCV-DETECT

The amount of

voltage change

allowed during

Receiver Detection

—

600

The total amount of voltage change that a transmitter

can apply to sense whether a low impedance

Receiver is present. See Note 6.

VTX-DC-CM

The TX DC

Common Mode

Voltage

—

3.6

The allowed DC Common Mode voltage under any

conditions. See Note 6.

ITX-SHORT

TX Short Circuit

Current Limit

—

The total current the Transmitter can provide when

shorted to its ground

TTX-IDLE-MIN

Minimum time

spent in Electrical

Idle

—

Minimum time a Transmitter must be in Electrical Idle

Utilized by the Receiver to start looking for an

Electrical Idle Exit after successfully receiving an

Electrical Idle ordered set

Table 71. Differential Transmitter (TX) Output Specifications (continued)

Symbol

Parameter

Min

Nom

Max

Units

Comments

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