Optional Cpu Fan; Glan1 Led; Glan2 Led; Table 3-22. Optional Cpu Fan (J34) - Ampro LittleBoard 735 Reference Manual

Chapter 3

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.
CAUTION

Table 3-22. Optional CPU Fan (J34)

Pin # Signal
1 Fan_Tach
2 VCC
3 GND
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.

Table 3-23. Ethernet External LED Pin Signal Descriptions (J47)

Pin # Signal
1 +V3.3_S5
2 ACT_LED1*
3 SPEED_LED1*
4 LINK1000_LED1*
5 GND
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. .

Table 3-24. Ethernet External LED Pin Signal Descriptions (J48)

Pin # Signal
1 +V3.3_S5
2 ACT_LED2*
3 SPEED_LED2*
4 LINK1000_LED2*
5 GND
Note: The shaded table cells denote power or ground. The * symbol indicates the signal is Active Low.
42
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.
Description
Fan Tachometer – This signal monitors the fan speed
+5.0 volts DC +/- 5%
Ground and Modulation – This signal controls the fan speed
Description
+3.3 Volts Ethernet Power
Ethernet Activity
Ethernet Speed
Ethernet Connection
Ethernet Ground
Description
+3.3 Volts Ethernet Power
Ethernet Activity
Ethernet Speed
Ethernet Connection
Ethernet Ground
Reference Manual
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LittleBoard 735