Compaq DC7600 HP Compaq dx 7200 and dc7600 Personal Computers, Technical Refer - Page 108
USB Connector, USB Control
UPC - 882780682009
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Input/Output Interfaces USB Control The USB is controlled through I/O registers as listed in table 5-21. Table 5-21. USB Control Registers I/O Address Register 00, 01h Command 02, 03h Status 04, 05h Interupt Enable 06, 07 Frame Number 08, 0B Frame List Base Address 0Ch Start of Frame Modify 10, 11h Port 1 Status/Control 12, 13h Port 2 Status/Control 18h Test Data Default Value 0000h 0000h 0000h 0000h 0000h 40h 0080h 0080h 00h 5.7.3 USB Connector These systems provide type-A USB ports as shown in Figure 5-10 below. 1 2 3 4 Figure 5-10. Universal Serial Bus Connector (Female) Table 5-22. USB Connector Pinout Pin Signal Description Pin Signal 1 Vcc +5 VDC 3 USB+ 2 USB- Data (minus) 4 GND Description Data (plus) Ground 5-28 www.hp.com Technical Reference Guide