Cpu type, Cmos rtc & isa cfg cmos sram – GIGABYTE Pentium II Processor 6EA User Manual
Page 16
Hardware Installation
3-6
DIP SWITCH (SW)
1
2
3
4
FREQ.
RATIO
EXT.CLK.
MHz
INT.CLK.
MHz
CPU Type
OFF
OFF
ON
ON
3.5
66
233
Pentium
II 233 MHz
ON
ON
OFF
ON
4
66
266
Pentium
II 266 MHz
OFF
ON
OFF
ON
4.5
66
300
Pentium
II 300 MHz
ON
OFF
OFF
ON
5
66
333
Pentium
II 333 MHz
OFF
OFF
OFF
ON
5.5
66
366
Pentium
II 366 MHz
MAIN CLOCK
JP2
JP3
JP4
66MHz
1-2
1-2
1-2
75MHz
1-2
2-3
1-2
83MHz
2-3
2-3
2-3
M
The CPU is a sensitive electric component and it can be easily
damaged by static electricity, so users must keep it away from metal
surface when the CPU is installed onto main board.
3.6. CMOS RTC & ISA CFG CMOS SRAM
There're RTC & CMOS SRAM on board; they have a power supply from
external battery to keep the DATA inviolate & effective. The RTC is a REAL-
TIME CLOCK device, which provides the DATE & TIME to system. The CMOS
SRAM is used for keeping the information of system configuration, so the
system can automatically boot OS every time. Since the lifetime of internal
battery is 5 years, the user can change a new Battery to replace old one after it
cannot work.
M Danger of explosion if battery is incorrectly replaced.
M Replace only with the same or equivalent type recommended by the
manufacturer.
M Dispose of used batteries according to the manufacturer’s instructions.