MPC8315E datasheet(65/112 Pages) FREESCALE

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

Freescale Semiconductor

PCI Express

Minimum time spent in

electrical idle

TTX-IDLE-MIN

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

——UI

—

Maximum time to

transition to a valid

electrical idle after

sending an electrical idle

ordered set

TTX-IDLE-SET-TO-IDLE After sending an Electrical

Idle ordered set, the

Transmitter must meet all

Electrical Idle Specifications

within this time. This is

considered a debounce time

for the Transmitter to meet

Electrical Idle after

transitioning from L0.

——

—

Maximum time to

transition to valid TX

specifications after leaving

an electrical idle condition

TTX-IDLE-TO-DIFF-DATA Maximum time to meet all TX

specifications when

transitioning from Electrical

Idle to sending differential

data. This is considered a

debounce time for the TX to

meet all TX specifications

after leaving Electrical Idle

——

—

Differential return loss

RLTX-DIFF

Measured over 50 MHz to

1.25 GHz.

—

Common mode return

loss

RLTX-CM

Measured over 50 MHz to

1.25 GHz.

6—

—

DC differential TX

impedance

ZTX-DIFF-DC

TX DC Differential mode Low

Impedance

100

120

—

Transmitter DC

impedance

ZTX-DC

Required TX D+ as well as D-

DC Impedance during all

states

—

Lane-to-Lane output skew

LTX-SKEW

Static skew between any two

Transmitter Lanes within a

single Link

—

500 + 2

—

AC coupling capacitor

CTX

All Transmitters shall be AC

coupled. The AC coupling is

required either within the

media or within the

transmitting component itself.

—

200

Table 54. Differential Transmitter (TX) Output Specifications (continued)

Parameter

Symbol

Comments

Min

Typical

Max

Units

Notes

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