Power LED and Keylock (CN1)
You can use an LED to indicate when the CPU card is on. Pin1 of CN1 supplies the LED’s power, and Pin3 is the ground.
You can use a switch (or a lock) to disable the keyboard so the PC will not respond to any input. This is useful if you do not want anyone to change or stop a running program. Connect the switch between Pin 4 and 5 of CN1.
Power LED and keylock (CN1)
Pin Function
1LED power (Vcc)
2N.C.
3GND
4Keyboard lock
5GND
Hard drive LED (CN2)
You can connect an LED to CN2 to indicate when the HDD is active.
Hard drive LED (CN2)
PinFunction
1
2
28
