Appendix B
Hardware Configuration
B-6
ni.com
Pin Definitions
NMI Button
The nonmaskable pin interrupt (NMI) button header is on pins 19 and 20 of
JF1. Refer to the following table for pin definitions.
Power LED
The power LED connection is on pins 15 and 16 of JF1. Refer to Table B-5
for pin definitions.
HDD LED/UID Switch
The HDD/UID LED connection is on pins 13 and 14 of JF1. Attach a hard
drive LED cable to these pins to display disk activity status for any hard
drive activities on the system, including serial ATA activity. Connect a UID
switch cable to use a UID switch connection. The front UID switch works
in conjunction with the UID LED on pins 7–8. Refer to Table B-6 for pin
definitions.
Table B-4.
NMI Button Pin Definitions
Pin
Definition
19
Control
20
Ground
Table B-5.
Power LED Pin Definitions
Pin
Definition
15
+5 V
16
Ground
Table B-6.
HDD LED/UID Pin Definitions
Pin
Definition
13
UID switch/3.3 V
14
HDD active