USB2422SLASHMJ datasheet(36/51 Pages) SMSC

36 / 51 page

2-Port USB 2.0 Hi-Speed Hub Controller

Datasheet

Revision 1.0 (06-04-13)

SMSC USB2422

DATASHEET

4.4.27

Boost Upstream Register (BOOSTUP)

4.4.28

Boost Downstream Register (BOOST40)

Address:

F6h

Size:

8 bits

BITS

DESCRIPTION

TYPE

DEFAULT

7:2

RESERVED

1:0

Boost Upstream (BOOST_IOUT_A)

USB electrical signaling drive strength Boost Bit for Upstream Port 'A'.

00 = Normal electrical drive strength

01 = Elevated electrical drive strength (+4% boost)

10 = Elevated electrical drive strength (+8% boost)

11 = Elevated electrical drive strength (+12% boost)

R/W

00b

Address:

F8h

Size:

8 bits

BITS

DESCRIPTION

TYPE

DEFAULT

7:4

RESERVED

3:2

Boost Downstream Port 2 (BOOST_IOUT_2)

USB electrical signaling drive strength Boost Bit for Upstream Port '2'.

00 = Normal electrical drive strength

01 = Elevated electrical drive strength (+4% boost)

10 = Elevated electrical drive strength (+8% boost)

11 = Elevated electrical drive strength (+12% boost)

R/W

00b

1:0

Boost Downstream Port 1 (BOOST_IOUT_1)

USB electrical signaling drive strength Boost Bit for Upstream Port '1'.

00 = Normal electrical drive strength

01 = Elevated electrical drive strength (+4% boost)

10 = Elevated electrical drive strength (+8% boost)

11 = Elevated electrical drive strength (+12% boost)

R/W

00b

USB2422/MJ 데이터시트(PDF) 36 Page - SMSC Corporation

USB2422/MJ 데이터시트(HTML) 36 Page - SMSC Corporation

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