Installing and Replacing Desktop Board Components
47
Serial Header
Figure 19, G shows the location of the serial header. Table 11 shows the pin
assignments and signal names for the serial header.
Table 11. Serial Port Header Signal Names
Pin Signal Name Pin Signal Name
1 DCD (Data Carrier Detect) 2 RXD# (Receive Data)
3 TXD# (Transmit Data) 4 DTR (Data Terminal Ready)
5 Ground 6 DSR (Data Set Ready)
7 RTS (Request To Send) 8 CTS (Clear To Send)
9 RI (Ring Indicator) 10 Key (no pin)
Front Panel USB 2.0 Headers
Figure 19, H shows the location of the front panel USB 2.0 headers and Table 12
shows the pin assignments and signal names.
Table 12. Front Panel USB 2.0 Headers Signal Names
Pin Signal Name Pin Signal Name
1 Power (+5 V) 2 Power (+5 V)
3 D- 4 D-
5 D+ 6 D+
7 Ground 8 Ground
9 Key 10 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.
Internal Mono Speaker Header
The internal mono speaker header is shown in Figure 19, I. Table 13 shows the pin
assignments and signal names for the internal mono speaker header.
Table 13. Internal Mono Speaker Header
Signal Names
Pin Signal Name
1 −
2 +
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