USB2514B-AEZG Standard Microsystems (SMSC), USB2514B-AEZG Datasheet - Page 45

• Manufacturer Part Number: USB2514B-AEZG
• Description: USB CHIP
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2514B-AEZG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251x
8.2.1.26
8.2.1.27
8.2.1.28
NUMBER
NUMBER
NUMBER
BIT
BIT
BIT
7:0
7:2
1:0
7:6
5:4
3:2
Register D0h: Battery Charging Enable
Register F6h: Boost_Up
Register F7h: Boost_7:5
BOOST_IOUT_7
BOOST_IOUT_6
BOOST_IOUT
BIT NAME
BIT NAME
BIT NAME
Reserved
Reserved
BC_EN
Only available in USB251xB/Bi hub family products.
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= Reserved
Bit 6= Reserved
Bit 5= Reserved
Bit 4= Controls Port 4
Bit 3= Controls Port 3
Bit 2= Controls Port 2
Bit 1= Controls Port 1
Bit 0= Reserved
Reserved
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:
Reserved
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)
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)
“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.
DATASHEET
45
DESCRIPTION
DESCRIPTION
DESCRIPTION
Revision 1.1 (04-26-10)