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USB2513 데이터시트(PDF) 46 Page - SMSC Corporation

부품명 USB2513
상세설명  USB 2.0 Hi-Speed Hub Controller
PDF  72 Pages
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제조업체  SMSC [SMSC Corporation]
홈페이지  http://www.smsc.com
Logo SMSC - SMSC Corporation

USB2513 데이터시트(HTML) 46 Page - SMSC Corporation

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USB 2.0 Hi-Speed Hub Controller
Datasheet
Revision 1.0 (3-11-09)
46
SMSC USB251x
DATASHEET
8.2.1.28
Register F7h: Boost_7:5
Note: “Boost” could result in non-USB Compliant parameters, OEM should use a ‘00’ value unless
specific implementation issues require additional signal boosting to correct for degraded USB
signalling levels.
BIT
NUMBER
BIT NAME
DESCRIPTION
7:6
Reserved
Reserved
5:4
BOOST_IOUT_7
USB electrical signaling drive strength Boost Bit for Downstream Port ‘7’.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (~4% boost)
‘10’ = Elevated electrical drive strength = Medium (~ 8% boost)
‘11’ = Elevated electrical drive strength = High (~12% boost)
3:2
BOOST_IOUT_6
USB electrical signaling drive strength Boost Bit for Downstream Port ‘6’.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (~4% boost)
‘10’ = Elevated electrical drive strength = Medium (~ 8% boost)
‘11’ = Elevated electrical drive strength = High (~12% boost)
1:0
BOOST_IOUT_5
USB electrical signaling drive strength Boost Bit for Downstream Port ‘5’.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (~4% boost)
‘10’ = Elevated electrical drive strength = Medium (~ 8% boost)
‘11’ = Elevated electrical drive strength = High (~12% boost)



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