Intel DP45SG manual USB 2.0 Headers, Serial Port Header, USB 2.0 Header Signal Names

Installing and Replacing Desktop Board Components

USB 2.0 Headers

Figure 23, J shows the location of the USB 2.0 headers. Table 14 shows the pin assignments and signal names for each USB 2.0 header. Each USB header can be used to connect two USB devices.

Table 14. USB 2.0 Header Signal Names

	USB Port A
Pin	Signal Name
1	Power (+5 V)
3	D-
5	D+

7Ground

9Key

	USB Port B
Pin	Signal Name
2	Power (+5 V)
4	D-
6	D+
8	Ground
10	No Connection

Note: USB ports may be assigned as needed.

NOTE

Computer systems that have an unshielded cable attached to a USB port might not meet FCC Class B requirements, even if no device or a low-speed USB device is attached to the cable. Use a shielded cable that meets the requirements for a full-speed USB device.

Serial Port Header

See Figure 23, E for the location of the serial port header. Table 15 shows the pin assignments for the header.

Table 15. Serial Port Header Signal Names

Pin	Signal Name
1	DCD
3	TXD#
5	Ground

7RTS

9RI

Pin	Signal Name
2	RXD#
4	DTR
6	DSR
8	CTS
10	No Connection

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