Intel DZ68BC Product Guide - Page 53
Serial Header, USB 2.0 Headers, Table 14. Serial Port Header, Table 15. USB 2.0 Header Signal Names
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Installing and Replacing Desktop Board Components Serial Header Figure 24, I shows the location of the serial headers. Table 14 shows the pin assignments and signal names for each serial header. Table 14. Serial Port Header Pin Signal Name 1 DCD (Data Carrier Detect) 3 TXD# (Transmit Data) 5 Ground 7 RTS (Request To Send) 9 RI (Ring Indicator) Pin Signal Name 2 RXD# (Receive Data) 4 DTR (Data Terminal Ready) 6 DSR (Data Set Ready) 8 CTS (Clear To Send) 10 Key (no pin) USB 2.0 Headers Figure 24, J shows the location of the four USB 2.0 headers. Table 15 shows the pin assignments and signal names for each USB 2.0 header. Each USB 2.0 header can be used to connect two USB devices. Table 15. USB 2.0 Header Signal Names Port A Pin Signal Name Pin 1 Power (+5 V) 2 3 D- 4 5 D+ 6 7 Ground 8 9 Key 10 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. 53