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USB2503 数据表(PDF) 19 Page - SMSC Corporation |
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USB2503 数据表(HTML) 19 Page - SMSC Corporation |
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19 / 43 page ![]() Integrated USB 2.0 Compatible 3-Port Hub Datasheet SMSC USB2503/USB2503A 19 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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