User manual

ATHENA CPU User Manual V1.40 Page 17
4.11 LCD Backlight Connector – J28
1 +12V
2 Control
3 Ground
Table 11: J28 – LCD Backlight Connector Pinout
Signal Name Definition
Control Output signal (from Athena) to allow power-down of backlight
+12V, Ground Power Supply for LCD Backlight assembly
J28 provides the Backlight power and control for the optional LCD panel. See J24 (above) for
details on the LCD data interface. Note that the +12V supply will be removed when the system is
powered down; the control signal is to allow the system to power-down the backlight when the
system enables monitor-power-down during its power management control.
Note: 12V must be provided either on the J11 input power connector or on the 12V pin on the
PC/104 connector in order for the LCD backlight to operated. This voltage is not generated
internally.
Connector Part Numbers
J28 Connector on CPU board: Digi-Key Corp. A19470
J28 Mating Cable Connector: Molex 22-01-3037
4.12 CPU Fan Connector – J27
1 Fan RPM
2 Ground
3 +5V
Table 12: J27 – CPU Fan Connector Pinout
Signal Name Definition
Fan-RPM TTL signal input that pulses with each revolution of the fan
+5V, Ground Power Supply for optional CPU Fan (if necessary)
Connector Part Numbers
J27 Connector on CPU board: Heilind Electronics 89400-0320
J27 Mating Cable Connector: JST PHR-3