USB2524 datasheet(10/57 Pages) SMSC

10 / 57 page

Chapter 2 Switching Hub Block Diagram

Figure 2.1 Switching Hub Block Diagram

U p stream

BUS

U p stream

PH Y

Up strea m

US B D ata

Re p e ate r

C ontro lle r

SIE

Se ria l

In terfac e

S w itc h ing Logic

D o w n stream

PH Y # 1

Po rt #1

OC S e n s e

S w itch D river

L E D Drive rs

Do w n s tre am

PHY # 2

Po rt # 2

OC S en s e

S w itch D rive r

L E D Driv e rs

Do w nstre am

US B D ata

Se nse

Sw itch /L ED

Drivers

D o w n stream

U SB D a ta

S ense

Sw itch /L ED

Drive rs

BUS Po w e r

Dete ct

In te rn al

Defa u lts

S e lect

U p stream

PH Y

Up strea m

US B D a ta

Re p e ate r

C ontro lle r

SIE

S trapping

Optio ns

PL L

24 M H z

Crysta l

3.3V

1.8 V

Re g .

1.8V

Cap

E EPR O M

or S M B us

Maste r

SC L S D

D o w n stream

PH Y #4

Po rt # 4

OC S e n s e

S w itch D river

L E D Driv ers

Down stre a m

USB D a ta

S ense

Sw itch/L ED

Drivers

D o w n stream

PH Y # 3

Po rt #3

OC S e n s e

S w itch D river

LE D D rive rs

D o w nstream

USB D a ta

S ense

Switch /L E D

Drive rs

Po rt

C ontro lle r

Po rt

C ontro lle r

R outing Logic

Po rt

Assig n

[3:0 ]

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