Specifications

Chapter 3 Hardware
LittleBoard 800 Reference Manual 37
Optional CPU Fan
Table 3-17 lists the pin signals of the optional CPU Fan, which uses 3 pins, single row, with 0.100" pitch.
Note: The shaded area denotes power or ground.
LAN LED
Table 3-18 lists the pin signals of the Ethernet external LED interface, which uses 5 pins, single row, with
0.100" pitch. This header is for an external LED, indicating Gigabit Ethernet power and activity.
Note: The shaded area denotes power or ground.
Table 3-17. Optional CPU Fan (J21)
Pin # Signal Description
1 Fan_Tach Fan Tachometer – This signal indicates Fan speed
2
VCC +5.0 volts DC +/- 5%
3
GND Ground
Table 3-18. Ethernet External LED Pin/Signal Descriptions (J28)
Pin # Signal Description
1
LED YEL Ethernet Power
2 LINK_LED_HDR# Ethernet Connection LED
3 MAC ACTLED_RES# Ethernet Activity
4 MAC LINK 1000# CON Ethernet Connection
5
GND Ground