MPC8378E datasheet(28/127 Pages) FREESCALE

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MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

8.3.1

SGMII AC Timing Specifications

This section describes the SGMII transmit and receive AC timing specifications. Transmitter and receiver

characteristics are measured at the transmitter outputs (L1_SD_TXn and L1_SD_TXn) or at the receiver

inputs (L1_SD_RXn and L1_SD_RXn) as depicted in Figure 9 respectively.

Figure 9. SGMII AC Test/Measurement Load

8.3.1.1

SGMII Transmit AC Timing Specifications

Table 28 provides the SGMII transmit AC timing targets. Source synchronous clocking is not supported.

Table 28. SGMII Transmit AC Timing Specifications

At recommended operating conditions with XVDD_SRDS = 1.0 V ± 5%.

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Deterministic Jitter

—

0.17

UIp-p

—

Total Jitter

—

0.35

UIp-p

—

Unit Interval

799.92

800

800.08

VOD fall time (80%–20%)

tfall

—

120

—

VOD rise time (20%–80%)

trise

—

120

—

Notes:

1 Each UI is 800 ps ± 100 ppm.

C = CTX

Silicon

+ Package

C = CTX

R = 50

D+ Package Pin

D– Package Pin

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