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6LMM7
GD: Green LED
PIN 1 : LED anode (+)
PIN 2 : LED cathode ( )
1
3.4. DRAM INSTALLATION
The mainboard can be installed with 16 / 32 / 64 / 128 / 256 MB 168 pins
DIMM module DRAM, and the DRAM speed must be 50 or 60 ns for EDO &
66~100 MHz for SDRAM. The DRAM memory system on mainboard
consists of bank 0, 1 & bank 2.
Since 168 pins DIMM module is 64 bits width, using 1 PCS which can match
a 64 bits system. The total memory size is 16 MB ~ 384MB SDRAM, EDO
DRAM size is 16MB ~ 768MB. The DRAM installation position refer to Figure
3.1, and notice the Pin 1 of DIMM module must match with the Pin 1 of
DIMM socket. Insert the DRAM DIMM module into the DIMM socket at
Vertical angle. If there is a wrong direction of Pin 1, the DRAM DIMM module
couldn't be inserted into socket completely.
3.5. CPU SPEED SETUP
The default system bus speed is 66.6MHz. The user can change the DIP
SWITCH (SW) selection to set up the CPU speed for 366 - 566MHz
processor. The CPU speed must match with the frequency RATIO. It will
cause system hanging up if the frequency RATIO is higher than CPU's.
DIP SWITCH (SW)
1
2
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
FREQ.
RATIO
3
4
OFF
ON
4.5
OFF
ON
5
OFF
ON
5.5
ON
OFF
6
ON
OFF
6.5
ON
OFF
7
ON
OFF
7.5
OFF
OFF
8
OFF
OFF
8.5
3-6
EXT.CLK.
INT.CLK.
MHz
MHz
66
300
66
333
66
366
66
400
66
433
66
466
66
500
66
533
66
566
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