MPC8569E datasheet(86/127 Pages) FREESCALE

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MPC8569E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1

PCI Express

Freescale Semiconductor

2.10.2.1

PCI Express DC Physical Layer Transmitter Specifications

This section discusses the PCI Express DC physical layer transmitter specifications for 2.5 Gb/s.

The following table defines the PCI Express (2.5 Gb/s) DC specifications for the differential output at all transmitters. The

parameters are specified at the component pins.

2.10.2.2

PCI Express DC Physical Layer Receiver Specifications

This section discusses the PCI Express DC physical layer receiver specifications for 2.5 Gb/s

The following table defines the DC specifications for the PCI Express (2.5 Gb/s) differential input at all receivers (RXs). The

parameters are specified at the component pins.

Table 49. PCI Express (2.5Gb/s) Differential Transmitter (TX) Output DC Specifications

At recommended operating conditions with XVDD = 1.0 V ± 3%. and 1.1 V ± 3%

Parameter

Symbol

Min

Typ

Max

Unit

Comments

Differential peak-to-peak

output voltage

VTX-DIFFp-p

800

10002 /

11003

1200

VTX-DIFFp-p = 2 × |VTX-D+ – VTX-D–| See note 1.

De-emphasized differential

output voltage (ratio)

VTX-DE-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 1.

DC differential TX impedance ZTX-DIFF-DC

100

120

TX DC Differential mode Low Impedance

Transmitter DC impedance

ZTX-DC

Required TX D+ as well as D– DC Impedance

during all states

Note:

1. Specified at the measurement point into a timing and voltage compliance test load as shown in Figure 46 and measured over

any 250 consecutive TX UIs.

2. Typ-VTX-DIFFp-p with XVDD = 1.0 V

3. Typ-VTX-DIFFp-p with XVDD = 1.1 V

Table 50. PCI Express (2.5 Gb/s) Differential Receiver (RX) Input DC Specifications

At recommended operating conditions with ScoreVDD = 1.0 V ± 3%. and 1.1 V ± 3%

Parameter

Symbol

Min

Typ

Max

Unit

Comments

Differential input

peak-to-peak

voltage

VRX-DIFFp-p

175

—

1200

VRX-DIFFp-p = 2 × |VRX-D+ – VRX-D–|. See note 1.

DC differential

input impedance

ZRX-DIFF-DC

100

120

RX DC Differential mode impedance. See Note 2.

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