MPC8535EBVTATH datasheet(55/126 Pages) FREESCALE

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Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management

MPC8535E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

2.9.3.3

SGMII Transmitter and Receiver DC Electrical Characteristics

Table 39 and Table 40 describe the SGMII SerDes transmitter and receiver AC-Coupled DC electrical characteristics.

Transmitter DC characteristics are measured at the transmitter outputs (SD2_TX[n] and SD2_TX[n]) as depicted in Figure 30.

Table 39. SGMII DC Transmitter Electrical Characteristics

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Supply Voltage

X2VDD

0.95

1.0

1.05

—

Output high voltage

VOH

—

X2VDD-Typ/2 +

|VOD|-max/2

Output low voltage

VOL

X2VDD-Typ/2 -

|VOD|-max/2

——

Output ringing

VRING

——

—

Output differential voltage2, 3, 5

|VOD|

323

500

725

Equalization

setting: 1.0x

296

459

665

Equalization

setting: 1.09x

269

417

604

Equalization

setting: 1.2x

243

376

545

Equalization

setting: 1.33x

215

333

483

Equalization

setting: 1.5x

189

292

424

Equalization

setting: 1.71x

162

250

362

Equalization

setting: 2.0x

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|—

—

Change in VOS between “0” and “1”

VOS

——

—

Output current on short to GND

ISA, ISB

——

—

Notes:

1. This will not align to DC-coupled SGMII. X2VDD-Typ=1.0V.

2. |VOD| = |VSD2_TXn - VSD2_TXn|. |VOD| is also referred as output differential peak voltage. VTX-DIFFp-p = 2*|VOD|.

3. The |VOD| value shown in the table assumes the following transmit equalization setting in the XMITEQAB (for SerDes 2 lanes

A & B) or XMITEQEF (for SerDes 2 lanes E & E) bit field of MPC8535E’s SerDes 2 Control Register:

• The MSbit (bit 0) of the above bit field is set to zero (selecting the full VDD-DIFF-p-p amplitude - power up default);

• The LSbits (bit [1:3]) of the above bit field is set based on the equalization setting shown in table.

4. VOS is also referred to as output common mode voltage.

• 5.The |VOD| value shown in the Typ column is based on the condition of X2VDD-Typ=1.0V, no common mode offset variation

(VOS =550mV), SerDes2 transmitter is terminated with 100-

Ω differential load between SD2_TX[n] and SD2_TX[n].

MPC8535EBVTATH Datasheet(PDF) 55 Page - Freescale Semiconductor, Inc

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