Kontron 986LCD-M-mITX (BGA) - Manual (Page 50)

986LCD-M Family
KTD-N0837-B Public User Manual Date: 2012-04-17 Page 50 of 91
4.14 Fan connectors , FAN_CPU and FAN_SYS.
The FAN_CPU is used for connection of the active cooler for the CPU.
The FAN_SYS can be used to power, control and monitor a fan for chassis ventilation etc.
PIN
Signal
Type
Ioh/Iol Pull
U/D
Note
1 SENSE PWR - 4K7
2 12V PWR - -
3 GND PWR - -
Signal description:
Signal Description
12V +12V supply for fan, can be turned on/off or modulated (PWM) by the chipset.
A maximum of 800 mA can be supplied from this pin.
SENSE Tacho signal from the fan for supervision. The signals shall be generated by an open collector
transistor or similar. On board is a pull-up resistor 4K7 to +12V. The signal has to be pulses,
typically 2 Hz per rotation.
4.15 The Clear CMOS Jumper, Clr-CMOS.
The Clr-CMOS Jumper is used to clear the CMOS content.
↑ CPU location ↑
No Jumper installed 1 2 3 (Pin numbers)
Jumper normal position
•
Jumper in Clear CMOS position
•
To clear all CMOS settings, including Password protection, move the CMOS_CLR jumper (with or without power
on the system) for approximately 1 minute.
Alternatively if no jumper is available, turn off power and remove the battery for 1 minute, but be careful to
orientate the battery corretly when reinserted.