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USB2513 数据表(PDF) 37 Page - Microchip Technology

部件名 USB2513
功能描述  USB 2.0 Hi-Speed Hub Controller
PDF  63 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB2513 数据表(HTML) 37 Page - Microchip Technology

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USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251xB/xBi
37
Revision 2.2 (02-17-12)
DATASHEET
5.1.25
Register 92h-CFh: Serial String
5.1.26
Register D0h: Battery Charging Enable
5.1.27
Register F6h: Boost_Up
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
SER_STR
Serial String: UNICODE UTF-16LE per USB 2.0 specification
When supported, the maximum string length is 31 characters (62 bytes).
Note:
The string consists of individual 16-bit UNICODE UTF-16LE
characters. The characters will be stored starting with the LSB at
the least significant address and the MSB at the next 8-bit location.
(Subsequent characters must be stored in sequential contiguous
address in the same LSB, MSB manner.)
Warning: Close attention to the byte order of the selected programming
tool should be monitored.
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
BC_EN
Battery Charging Enable: enables the battery charging feature for the
corresponding port.
0 : battery charging support is not enabled
1 : battery charging support is enabled
Bit 7 : rsvd
Bit 6 : rsvd
Bit 5 : rsvd
Bit 4 : controls port 4
Bit 3 : controls port 3
Bit 2 : controls port 2
Bit 1 : controls port 1
Bit 0 : rsvd
BIT
NUMBER
BIT NAME
DESCRIPTION
7:2
rsvd
1:0
BOOST_IOUT
USB electrical signaling drive strength boost bit for the upstream port.
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)
Note:
Boost could result in non-USB compliant parameters. Therefore, a
value of 00 should be implemented unless specific implementation
issues require additional signal boosting to correct for degraded
USB signalling levels.



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