Intel DP55SB Product Guide - Page 53
USB 2.0 Headers, IEEE 1394a Header, Table 9. USB 2.0 Header Signal Names
UPC - 735858206006
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Installing and Replacing Desktop Board Components USB 2.0 Headers Figure 27, F shows the location of the USB 2.0 headers. Table 9 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 9. USB 2.0 Header Signal Names USB Port A Pin Signal Name Pin 1 Power (+5 V) 2 3 D- 4 5 D+ 6 7 Ground 8 9 Key 10 Note: USB ports may be assigned as needed. USB Port B Signal Name Power (+5 V) DD+ Ground No Connection 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. IEEE 1394a Header Figure 27, G shows the location of the IEEE 1394a header. Table 10 shows the pin assignments and signal names for the IEEE 1394a header. Table 10. IEEE 1394a Header Signal Names Pin Signal Name 1 TPA1+ 3 Ground 5 TPA2+ 7 +12 V 9 Key (no pin) Pin Signal Name 2 TPA1- 4 Ground 6 TPA2- 8 +12 V 10 Ground 53