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3-pin Mode:
HEADER
PIN
1
2
3
4
SIGNAL
DESCRIPTION
PWM
PWM output signal for FAN speed control.
TACHO
Tacho input signal from the fan, for rotation speed supervision RPM (Rotation Per
Minute). The signal shall be generated by an open collector transistor or similar.
Onboard is a pull-up resistor 4K7 to +12 V. The signal has to be pulsed and onboard
circuit is prepared for two pulses per rotation.
12 V
+12 V supply for fan. A maximum of 2000 mA can be supplied from this pin.
GND
Power Supply GND signal
09.04.
PS/2 KEYBOARD AND MOUSE CONNECTOR (KBDMSE) (J15)
Attachment of a PS/2 keyboard/mouse can be done through the pinrow connector KBDMSE
(J15).
Both interfaces utilize open-drain signalling with on-board pull-up.
The PS/2 mouse and keyboard is supplied from SB5 V when in standby mode in order to enable
keyboard or mouse activity to bring the system out from power saving states. The supply is
provided through a 1.1 A resettable fuse.
Note:
The PS/2 connector does not support wake functions.
PIN
SIGNAL
1
KBDCLK
2
KBDDAT
3
MSCLK
4
MSDAT
5
5 V/SB5 V
6
GND
MITX-BDW-U (KTD-NO886-B)
SIGNAL
TACHO
12 V
GND
TYPE
IOH/IOL
IOD
/14 mA
IOD
/14 mA
IOD
/14 mA
IOD
/14 mA
PWR
-
PWR
-
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DESCRIPTION
TYPE
Not used
Tacho signal
I
Power +12 V
PWR
Ground
PWR
PULL U/D
2K7
2K7
2K7
2K7
-
-
NOTE
// 31 - 104
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