12
COM1 Header: JCOM1-HEADER1
12
910
JC OM1-HEAD ER 1
Pin Assignment Pin Assignment
1
RIN1
2
RIN3
3
DOUT2
4
DOUT3
5
Ground
6
RIN2
7
DOUT1
8
RIN4
9
-XRI1
10
NA
System Operation Mode: JCLK3
Note: When overclock function failed and system is unable to boot-up, please
follow the instruction below:
1. Turn off the system.
2. Closed the JCLK3 jumper.
3. Turn on the system.
4. Enter CMOS setup menu and load defaults settings.
5. Turn off the system.
6. Open the JCLK3 jumper.
7. Turn on the system.
JCLK3 Assignment
1
Pin 1-2 Open
User Mode (default)
(133/ 166 MHz)
1
Pin 1-2 Close
Safe mode
(100 MHz)
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