Hardware Configuration Features B-9If you reconfigure your hardware, you may need pinnumber and signal information for the USB connectors.Figure B-8 illustrates the pin numbers for the USBconnectors, and Table B-7 lists and defines the pinassignments and interface signals for the USBconnectors.Figure B-8. Pin Numbers for the USB Connec-torsMicrophone JackThe microphone jack (see Figure B-9) can be used toattach a standard personal computer microphone.Connect the audio cable from the microphone to themicrophone jack. The microphone input is a mono sourcewith maximum signal levels of 89 millivolts root meansquared (mVrms).Figure B-9. Microphone JackLine-Out JackThe line-out jack (see Figure B-10) can be used to attachmost computer speakers. The line-out jack is amplified,so speakers with integrated amplifiers are not required.Connect the audio cable from the speakers to this jack.Figure B-10. Line-Out JackLine-In JackThe line-in jack (see Figure B-11) can be used to attachrecord/playback devices such as cassette players, CDplayers, and VCRs. Connect the line-out cable from anyof these devices to the line-in jack on the back of yourcomputer.Figure B-11. Line-In JackTable B-7. Pin Assignments for the USBConnectorsPin Signal I/O Definition1 Vcc N/A Supply voltage2 DATA I Data in3 +DATA O Data out4 GND N/A Signal ground12USB1 41 4
