88F6281

Hardware Specifications

Table 70: USB Full Speed Driver and Receiver Characteristics

 

 

Full Speed

 

 

Description

Sym bol

Min

Max

Units

Notes

Baud Rate

BR

12.0

Mbps

-

Baud rate tolerance

Bppm

-2500.0

2500.0

ppm

-

Driver Parameters

 

 

 

 

Ouput single ended high

VOH

2.8

3.6

V

1

Ouput single ended low

VOL

0.0

0.3

V

2

Output signal crossover voltage

VCRS

1.3

2.0

V

4

Output rise time

TFR

4.0

20.0

ns

3, 4

Output fall time

TFL

4.0

20.0

ns

3, 4

Source jitter total: to next transition

TDJ1

-3.5

3.5

ns

5, 6

Source jitter total: for paired transitions

TDJ2

-4.0

4.0

ns

5, 6

Source jitter for differential transition to SE0 transition

TFDEOP

-2.0

5.0

ns

6

Receiver Parameters

 

 

 

 

Input single ended high

VIH

2.0

-

V

-

Input single ended low

VIL

-

0.8

V

-

Differential input sensitivity

VDI

0.2

-

V

-

Receiver jitter : to next transition

tJR1

-18.5

18.5

ns

6

Receiver jitter: for paired transitions

tJR2

-9.0

9.0

ns

6

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 w ith 1.425 kilohm pull-up resistor to 3.6V.

2..Defined w ith 14.25 kilohm pull-dow n resistor to ground.

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

4.See "Data Signal Rise and Fall Time" w aveform.

5.Including frequency tolerance. Timing difference betw een the differential data signals.

6.Defined at crossover point of differential data signals.

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

 

Copyright © 2008 Marvell

Page 126

Document Classification: Proprietary Information

December 2, 2008, Preliminary

Page 126
Image 126
Marvel Group 88F6281 specifications Full Speed Description, Min Max