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Chapter 2 Connecting Peripherals
29
2.7.2 Controlling the soft power switch
It is easy to control the ATX soft power switch. Pushing the button
once will switch the system between the "On" and "Suspend" power
modes. Pushing the button for more than 4 seconds while in the "On"
mode will turn the system off. Users can also identify the current
power mode through the system's power LED, as indicated below:
ATX Power Mode LED Status
System On On
System Suspend Flashes eight times/sec.
System Off Flashes once/sec.
2.8 USB Connector (CN11)
The PCA-6175 CPU card provides two USB (Universal Serial Bus)
interfaces, which give complete plug and play, hot attach/detach for
up to 127 external devices.The USB interfaces comply with USB
Specification Rev. 1.0, and are fuse-protected.
The USB interfaces are accessed through a 10-pin flat-cable
connector, CN11. The adapter cable has a 10-pin connector on one
end and a USB connector on the bracket.
The USB interfaces can be disabled in the system BIOS setup.
2.9 IR Connector (CN1)
This connector supports the optional wireless infrared transmitting
and receiving module. This module mounts on the system case. You
must configure the setting through the BIOS setup.
2.10 External Keyboard Connector (J10)
In addition the the PS/2 mouse/keyboard connector on the PCA-
6175's rear plate, there is also an extra on-board external keyboard
connector. This gives system integrators greater flexibility in design-
ing their systems.