MPC8569E datasheet(70/127 Pages) FREESCALE

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MPC8569E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1

Ethernet Interface

Freescale Semiconductor

2.6.4.2.2

SGMII Transmit AC Timing Specifications

The following table provides the SGMII transmit AC timing specifications. A source synchronous clock is not supported. The

AC timing specifications do not include RefClk jitter.

2.6.4.2.3

SGMII AC Measurement Details

Transmitter and receiver AC characteristics are measured at the transmitter outputs (SD_TXn and SD_TXn) or at the receiver

inputs (SD_RXn and SD_RXn), as depicted in the following figure, respectively.

Figure 29. SGMII AC Test/Measurement Load

Table 38. SGMII Transmit AC Timing Specifications

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

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Deterministic jitter

—

0.17

UI p-p

—

Total jitter

—

0.35

UI p-p

Unit interval

799.92

800

800.08

AC coupling capacitor

CTX

—

200

Notes:

1. Each UI is 800 ps ± 100 ppm.

2. See Figure 30 for single frequency sinusoidal jitter limits.

3. The external AC coupling capacitor is required. It is recommended that it be placed near the device transmitter outputs.

Silicon

+ Package

C = CTX

R = 50

D+ Package

D– Package

D+ Package

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