Intel PCA-6175 manual Front Panel Connectors CN2, CN3, CN4, J1 and J2

2.6Front Panel Connectors (CN2, CN3, CN4, J1 and J2)

There are several external switches to monitor and control the PCA-6175.

2.6.1 Keyboard lock and power on LED (CN2)

CN2 is a 5-pin connector for the keyboard lock and power on LED connection. Refer to Appendix B.12 for detailed information on the pin assignments. If a PS/2 power supply is used, the system's power LED status will be one of the following:

PS/2 Power Mode	LED Status
System On	O n
System Suspend	Flashes eight times/sec.
System Off	O f f

If an ATX power supply is used, refer to Section 2.7.2.

2.6.2 External speaker (CN3)

CN3 is a 4-pin connector for an extenal speaker connection. If there is no external speaker, the PCA-6175 provides an on-board buzzer as an alternative. To enable the buzzer, set pins 3-4 as closed.

2.6.3 IDE LED (CN4)

You can connect an LED to connector CN4 to indicate when the HDD is active.

2.6.4 ATX soft power switch (J1)

If your computer case is equipped with an ATX power supply, you should connect the power on/off button on your computer case to J1. This connection enables you to turn your computer on and off.

2.6.5 Reset (J2)

Many computer cases offer the convenience of a reset button. Connect the wire from the reset button to J2.

Chapter 2 Connecting Peripherals 27