SMSC switch USB2504 Manual

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46 Pages English

SMSC switch USB2504
Integrated USB 2.0 Compatible 4-Port Hub
Datasheet
SMSC USB2504/USB2504A 21 Revision 2.3 (08-27-07)
DATASHEET
5.2.3.1 EEPROM Offset 1:0(h) - Vendor ID
5.2.3.2 EEPROM Offset 3:2(h) - Product ID
5.2.3.3 EEPROM Offset 5:4(h) - Device ID
5.2.3.4 EEPROM Offset 6(h) - CONFIG_BYTE_1
BIT
NUMBER BIT NAME DESCRIPTION
15:8 VID_MSB Most Significant Byte of the Vendor ID.
7:0 VID_LSB Least Significant Byte of the Vendor ID.
BIT
NUMBER BIT NAME DESCRIPTION
15:8 PID_MSB Most Significant Byte of the Product ID.
7:0 PID_LSB Least Significant Byte of the Product ID.
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 PORT_IND Port Indicator Support: Indicates implementation of LED indicators
0 = No LED indicators.
1 = LED indicators.
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 MTT_ENABLE Multi-TT enable: Enables one transaction translator per port operation.
0 = single TT for all ports.
1 = one TT per port (multiple TT’s supported)
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