ADLINK LittleBoard 735 - Manual (Page 48)

Chapter 3 Hardware
42 Reference Manual LittleBoard 735
Optional CPU Fan
Table 3-22 lists the pin signals of the optional CPU Fan interface, which provides a 3-pin, single-row header
with 0.100" (2.54mm) pitch.
Note: The shaded table cells denote power or ground.
GLAN1 LED
Table 3-23 lists the pin signals of the J47, external GLAN1 LED interface, which provides a
5-pin, single-row header with 0.049" (1.24mm) pitch.
Note: The shaded table cells denote power or ground. The * symbol indicates the signal is Active Low.
GLAN2 LED
Table 3-23 lists the pin signals of the J48, external GLAN2 LED interface, which provides a
5-pin, single-row header with 0.049" (1.24mm) pitch. .
Note: The shaded table cells denote power or ground. The * symbol indicates the signal is Active Low.
CAUTION The voltage to the fan should not exceed 130mA on the LB-735-R-18
model and 250mA on the LB-735-P-18 and LB-735-F-18 models or
significant damage to the board may occur. See the LittleBoard 735
Hardware Release Notes for more details.
Table 3-22. Optional CPU Fan (J34)
Pin # Signal Description
1 Fan_Tach Fan Tachometer – This signal monitors the fan speed
2 VCC +5.0 volts DC +/- 5%
3 GND Ground and Modulation – This signal controls the fan speed
Table 3-23. Ethernet External LED Pin Signal Descriptions (J47)
Pin # Signal Description
1 +V3.3_S5 +3.3 Volts Ethernet Power
2 ACT_LED1* Ethernet Activity
3 SPEED_LED1* Ethernet Speed
4 LINK1000_LED1* Ethernet Connection
5 GND Ethernet Ground
Table 3-24. Ethernet External LED Pin Signal Descriptions (J48)
Pin # Signal Description
1 +V3.3_S5 +3.3 Volts Ethernet Power
2 ACT_LED2* Ethernet Activity
3 SPEED_LED2* Ethernet Speed
4 LINK1000_LED2* Ethernet Connection
5 GND Ethernet Ground