SBC82621 Socket370 Half-size All-in-One CPU Card User’s Manual
Power LED
This 2-pin connector, designated at Pins 1 and Pin 5 of
CN3, connects the system power LED indicator to its
respective switch on the case. Pin 1 is +, and pin 5 is
assigned as -. The Power LED lights up when the system
is powered ON.
External Speaker and Internal Buzzer Connector
Pins 2, 4, 6, and 8 of CN3 connect to the case-mounted
speaker unit or internal buzzer. Short pins 4-6 when
connecting the CPU card to an internal buzzer. When
connecting an external speaker, set these jumpers to Open
and install the speaker cable on pin 8 (+) and pin 2 (-).
System Reset Switch
Pins 9 & 11 of CN3 connect to the case-mounted reset
switch and allow rebooting of your computer instead of
turning OFF the power switch. This is a preferred method
of rebooting in order to prolong the life of the system
’
s
power supply.
HDD Activity LED
This connector extends to the hard drive activity LED on
the control panel. This LED will flash when the HDD is
being accessed. Pins 10 & 12 of CN3 connect the hard
disk drive and the front panel HDD LED. Pins 10 is -, and
pin 12 is assigned as +.
2.4.14 Enhanced IDE Interface Connector
The
SBC82621
includes a PCI bus enhanced IDE controller
that can support master/slave mode and post write transaction
mechanisms with 64-byte buffer, and master data transaction.
This feature, connected via connector IDE1, allows the
SBC82621
to handle 2 IDE drives. Refer to Appendix B for the
pinout assignments of IDE1
.
Jumpers and Connectors
24
