HP D315 5.7UNIVERSAL SERIAL BUS INTERFACE

Chapter 5 Input/Output Interfaces

5.7UNIVERSAL SERIAL BUS INTERFACE

MCP

USB

Cntlr. #1

USB

Cntlr. #2

The Universal Serial Bus (USB) interface provides asynchronous/isochronous data transfers with compatible peripherals such as keyboards, printers, or modems. This high-speed interface supports hot-plugging of compatible devices, making possible system configuration changes without powering down or even rebooting systems.

All models provide six USB ports; four rear-mounted ports and two ports accessible in the front. The system dynamically makes the port-to-controller configuration based on the bandwidth demands of the connected USB peripheral devices.

	Rear Panel	MCP		Rear Panel
Tx/Rx Data			Tx/Rx Data
	USB Port 1	USB 1.1		USB Port 1
Tx/Rx Data		Cntlr. #1	Tx/Rx Data
	USB Port 2			USB Port 2
Tx/Rx Data			Tx/Rx Data
	USB Port 3	USB 1.1		USB Port 3
Tx/Rx Data			Tx/Rx Data
		Cntlr. #2
	USB Port 4			USB Port 4
Sys. Board			Sys. Board
Header	Front Panel		Header	Front Panel
Tx/Rx Data	USB Port 5	USB 2.0	Tx/Rx Data	USB Port 5
Tx/Rx Data		Cntlr.	Tx/Rx Data
	USB Port 6			USB Port 6

D315			d325
		Difference Matrix
	Function	D315	D325
	USB Controller Type:
	Controller #1	USB 1.1	USB 1.1
	Controller #2	USB 1.1	USB 1.1
	Controller #3	na	USB 2.0
	Port-to-Controller Type	3 per controller,	6 to 1.1,
	Configuration Options	2 to one, or 4 to another	4 to 1.1 & 2 to 2.0,
			3 to 1.1 & 3 to 2.0,
			2 to 1.1 & 4 to 2.0,
			6 to 2.0

Figure 5-7.USB I/F Block Diagram and Difference Matrix

5-22Compaq D315 and hp d325 Personal Computers Featuring the AMD Athlon XP Processor

Second Edition – April 2003