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USB2422/MJ 数据表(PDF) 36 Page - SMSC Corporation

部件名 USB2422/MJ
功能描述  2-Port USB 2.0 Hi-Speed Hub Controller
PDF  51 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  SMSC [SMSC Corporation]
网页  http://www.smsc.com
标志 SMSC - SMSC Corporation

USB2422/MJ 数据表(HTML) 36 Page - SMSC Corporation

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2-Port USB 2.0 Hi-Speed Hub Controller
Datasheet
Revision 1.0 (06-04-13)
36
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



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