786LCD/mITX Family
KTD-00629-K
Public User Manual
Date: 2009-10-13 Page
41 of 77
4.13 Fan connectors , SYSTEM FAN and CPU FAN.
The
SYSTEM FAN
can be used to power, control and monitor a fan for chassis ventilation etc.
The
CPU FAN
is used for connection of the active cooler for the CPU.
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.
4.14 The Clear CMOS Jumper, Clr-CMOS.
The Clr-CMOS Jumper is used to clear the CMOS content.
↑
Battery
↑
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.
4.15 LPC IFC connector (unsupported).
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
-
-
PWR
GND 1
2
LPCCLK
-
-
PWR
GND 3
4
LPC AD0
LPC FRAME#
5
6
LPC AD1
INT SERIQ
7
8
LPC AD2
LPC DRQ#1
9 10
LPC AD3
