MPC8378EVRALDA datasheet(25/126 Pages) FREESCALE

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MPC8378E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)

8.2.2

SGMII DC Electrical Characteristics

Table 25 and Table 26 describe the SGMII DC electrical characteristics. Transmitter DC characteristics are

measured at the transmitter outputs (L1_SD1_TXn and L1_SD1_TXn) as depicted in Figure 8.

NOTE

The voltage levels of the transmitter and the receiver depend on the SerDes

control registers which should be programmed at the recommended values

for SGMII protocol (L1_nVDD =1.0 V).

Table 25. SGMII DC Transmitter Electrical Characteristics

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Supply voltage

(L1_SDAVDD_0,

L1_XCOREVDD)

XVDD_SRDS

0.95

1.0

1.05

—

Output high voltage

VOH

——

XVDD_SRDS-Typ/2

+ |VOD|-max/2

Output low voltage

VOL

XVDD_SRDS-Typ/2

– |VOD|-max/2

——

Output ringing

VRING

——

—

Output differential voltage 2, 3,

|VOD|

323

500

725

Equalization

setting: 1.0

296

459

665

Equalization

setting: 1.09

269

417

604

Equalization

setting: 1.2

243

376

545

Equalization

setting: 1.33

215

333

483

Equalization

setting: 1.5

189

292

424

Equalization

setting: 1.71

162

250

362

Equalization

setting: 2.0

Output offset voltage

VOS

425

500

575

1, 4

Output impedance

(single-ended)

—

Mismatch in a pair

——

—

Change in VOD between “0” and

“1”

|VOD|—

—

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