Electrical Specifications

Differential Interface Electrical Characteristics

Table 71: USB High Speed Driver and Receiver Characteristics

 

 

 

High Speed

 

 

Description

 

Symbol

Min

Max

Units

Notes

Baud Rate

 

BR

480.0

Mbps

-

Baud rate tolerance

 

Bppm

-500.0

500.0

ppm

-

 

Driver Parameters

 

 

 

 

Data signaling high

 

VHSOH

360.0

440.0

mV

-

Data signaling low

 

VHSOL

-10.0

10.0

mV

-

Data rise time

 

THSR

500.0

-

ps

1

Data fall time

 

THSF

500.0

-

ps

1

Data source jitter

 

 

See

note 2

 

2

 

Receiver Parameters

 

 

 

 

Differential input signaling levels

 

 

See note 3

 

3

Data signaling common mode voltage range

 

VHSCM

-50.0

500.0

mV

-

Receiver jitter tolerance

 

 

See

note 3

 

3

Notes:

General Comment: For more information, refer to Universal Serial Bus Specification, Revision 2.0, April 2000.

General Comment: The load is 100 ohm differential for these parameters, unless otherw ise specified.

General Comment: To comply w ith the values presented in this table, refer to your local Marvell representative for register settings.

1.Defined from 10% to 90% for rise time and 90% to 10% for fall time.

2.Source jitter specified by the "TX eye diagram pattern template" figure.

3.Receiver jitter specified by the "RX eye diagram pattern template" figure.

8.7.4.2USB Interface Driver Waveforms

Figure 44: Low/Full Speed Data Signal Rise and Fall Time

Rise Time

Fall Time

VCRS

10%

Differential

Data Lines

90%

90%

TR

TF

10%

Copyright © 2008 Marvell

 

Doc. No. MV-S104859-U0 Rev. E

December 2, 2008, Preliminary

Document Classification: Proprietary Information

Page 127

Page 127
Image 127
Marvel Group 88F6281 specifications USB Interface Driver Waveforms, USB High Speed Driver and Receiver Characteristics