Smbus Connector (Cn1); Front Panel Connector (Cn2) - AXIOMTEK CAPA312 User Manual

CAPA312 3.5" Board
2.4.1

SMBus Connector (CN1)

This connector is a 3-pin (pitch=2.0mm) wafer connector, which is compliant with JST
B3B-PH-K-S, for SMBus interface. The SMBus (System Management Bus) is a simple
bus for the purpose of lightweight communication.
Pin
1
2
3
2.4.2

Front Panel Connector (CN2)

This is a 2x5-pin header (pitch=2.0mm) for front panel interface.
Pin Signal
1 PWR-
3 PWRLED-
5 PWRSW-
7 HW RST-
9 HDDLED-
Power Status
Pin 1 and pin 2 are for power status button; letting user know the power status of this
board.
Power LED
Pin 4 connects anode (+) of LED and pin 3 connects cathode(-) of LED. The power LED
lights up when the system is powered on.
Power On/Off Button
Pin 5 and 6 connect the power button on front panel to CPU board, which allows users to
turn on or off power supply.
System Reset Switch
Pin 7 and 8 connect the case-mounted reset switch that reboots your computer without
turning off the power switch. It is a better way to reboot your system for a longer life of
system power supply.
HDD Activity LED
This connection is linked to hard drive activity LED on the control panel. LED flashes
when HDD is being accessed. Pin 9 and 10 connect the hard disk drive to the front panel
HDD LED, pin 9 is assigned as cathode(-) and pin 10 is assigned as anode(+).
12
Signal
SMBus clock
SMBus data
GND
Pin Signal
2 PWR+
4 PWRLED+
6 PWRSW+
8 HW RST+
10 HDDLED+
Board and Pin Assignments