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USB2502 数据表(PDF) 21 Page - SMSC Corporation

部件名 USB2502
功能描述  2-Port USB 2.0 Hub Controller
PDF  44 Pages
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制造商  SMSC [SMSC Corporation]
网页  http://www.smsc.com
标志 SMSC - SMSC Corporation

USB2502 数据表(HTML) 21 Page - SMSC Corporation

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2-Port USB 2.0 Hub Controller
Datasheet
SMSC USB2502
21
Revision 2.1 (12-06-06)
DATASHEET
5.2.3.3
EEPROM Offset 5:4(h) - Device ID
5.2.3.4
EEPROM Offset 6(h) - CONFIG_BYTE_1
5.2.3.5
EEPROM Offset 7(h) - CONFIG_BYTE_2
BIT
NUMBER
BIT NAME
DESCRIPTION
15:8
DID_MSB
Most Significant Byte of the Device ID.
7:0
DID_LSB
Least Significant Byte of the Device ID.
BIT
NUMBER
BIT NAME
DESCRIPTION
7
SELF_BUS_PWR
Self or Bus Power: Selects between Self- and Bus-Powered operation.
0 = Bus-Powered operation. (BUS Default)
1 = Self-Powered operation. (SELF Default)
Note: If Dynamic Power Switching is enabled, this bit is ignored and the
SELF_PWR pin is used to determine if the hub is operating from self or bus
power.
6
Reserved
Reserved
5
HS_DISABLE
High Speed Disable: Disables the capability to attach as either a High/Full-
speed device, and forces attachment as Full-speed only i.e. (no High-Speed
support).
0 = High-/Full-Speed. (Default)
1 = Full-Speed-Only (High-Speed disabled!)
4
Reserved
Reserved
3
EOP_DISABLE
EOP Disable: Disables EOP generation at EOF1 when no downstream
directed traffic is in progress.
0 = EOP generation at EOF1 is enabled.
1 = EOP generation at EOF1 is disabled, (normal operation). (Default)
2:1
CURRENT_SNS
Over Current Sense: Indicates whether current sensing is ganged.
00 = Ganged sensing (all ports together). (Default for self-power)
01 = Reserved
1x = Over current sensing not supported. (may be used with Bus-Powered
configurations only!, and is the default for bus-power)
0
Reserved
Reserved
BIT
NUMBER
BIT NAME
DESCRIPTION
7
DYNAMIC
Dynamic Power Enable: Controls the ability for the Hub to transition to Bus-
Powered operation if the local power source is removed (can revert back to
Self-Power if local power source is restored).
0 = No Dynamic auto-switching.
1 = Dynamic Auto-switching capable.(Default)
6
Reserved
Reserved



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