USB2517-JZX Standard Microsystems (SMSC), USB2517-JZX Datasheet - Page 46

• Manufacturer Part Number: USB2517-JZX
• Description: USB HUB
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2517-JZX

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

Revision 1.1 (04-26-10)
8.2.1.29
NUMBER
NUMBER
BIT
BIT
1:0
7:6
5:4
3:2
1:0
Note: “Boost” could result in non-USB Compliant parameters, OEM should use a ‘00’ value unless
Register F8h: Boost_4:0
Note: “Boost” could result in non-USB Compliant parameters, OEM should use a ‘00’ value unless
BOOST_IOUT_5
BOOST_IOUT_4
BOOST_IOUT_3
BOOST_IOUT_2
BOOST_IOUT_1
BIT NAME
BIT NAME
specific implementation issues require additional signal boosting to correct for degraded USB
signalling levels.
specific implementation issues require additional signal boosting to correct for degraded USB
signalling levels.
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)
USB electrical signaling drive strength Boost Bit for Downstream Port ‘4’.
‘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 ‘3’.
‘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 ‘2’.
‘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 ‘1’.
‘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)
DATASHEET
46
DESCRIPTION
DESCRIPTION
USB 2.0 Hi-Speed Hub Controller
SMSC USB251x
Datasheet