6MZX1
I440ZX Main Board
17
SMI connector is a 2-pin Berg strip which is also called “green” or “sleep”
connector. When SMI is turned from open to close and back to open, the system
will enter sleep mode immediately. This function is to make sure power saving is
working well. In PC system, it is used to connect to the push button SMI switch
located on the case front panel (if there is). The system can be forced to power
saving mode by pressing the SMI switch.
POWER LED is a 3-pin connector. It is used to connect to the LED on the
case front panel. The LED shows the status of the power.
KEYLOCK is a 2-pin connector. It is used to connect the key lock on the case
front panel (if there is). Keyboard may be disconnected with the system
through this function.
Pin
Operation
Open
Normal
Close
Short the connector to be disconnected with the system
SPEAKER connector is a 4-pin keyed Berg strip. It is used to connect to the case
speaker to the main board for sound purpose.
RESET is a 2 -pin keyed Berg strip, connected to the push button reset switch
on the case’s front panel. Shorting both pin 1& pin 2 can reset the system,
which is similar to the power off and then on again.
Pin
Operation
Open
Normal
Close Hardware reset
Marked “HDLED”, Hard Disk activity LED connector is a 2-pin keyed Berg
strip. It is used to connect to front panel Hard Disk LED.
TBLED with a 2-pin Berg strip on case front panel indicates the current speed
status of system. It is used to connect to the Turbo Led on the front panel of the
case (if there is).
ATX SW is ATX Soft-PWR with 2 pins.
