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S1684S/SA-001-02
2.4 CMOS RTC (Real Time Clock)
The CMOS RTC includes an internal battery and real time clock circuit
which provides the date and the time, and the CMOS Chipset Default Reg-
ister for the system. Normally, the life span of a RTC internal battery is
more than 10 years. This RTC chip cannot be field upgraded and can only
be changed at a Tyan repairing facility.
2.5 Installing Cables and Connectors
2.5.1 Speaker Connector Installation (J50)
Your S1684S/SA board provides a 4-pin header to connect the speaker.
The speaker is connected to pins 24-27 of J50. (Refer to Page 10 and Page
11 for detailed information.)
2.5.2 Hardware Reset Switch Connector Installation (J50)
The RESET switch on your case's display panel provides you with the HARD-
WARE RESET function which is the same as power on/off. The system
will do a cold start after the RESET switch is pushed by the user. The
RESET switch is a 2 pin connector and should be installed on pins
22 and 23 on J50. (Refer to Page 10 and Page 11 for detailed information.)
2.5.3 IDE LED Connector Installation (J50)
Your board provides a 2-pin header to connect the IDE LED cable. When
connected, the IDE LED light on the panel of the case flashes if an activity
is detected in an IDE device. The cable is connected to pins 15-16 of J50.
(Refer to Page 10 and Page 11 for detailed information.)
2.5.4 Power LED Connector Installation (J50)
The motherboard also provides a 3-pin header to connect the Power LED
cable. When connected, the Power LED light on the panel of the case indi-
cates power on/off of the system. The cable is connected to pins 18-20 of
J50. (Refer to Page 10 and Page 11 for detailed information.)
2.5.5 Infra Red Connector Installation (J50)
The motherboard provides a 3-pin connector (Pins 8-10 of J50) for the
Infra Red cable which connects to a Homing Device on the back of the case.
When activated, the Homing Device will send out IR signals to remote I/O
IR devices. (Refer to Page 10 and Page 11 for detailed information.)
